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IaTR6
Dennis Costello
Central Iowa
(125 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6

Tremec T5 oil leak
Posted by: IaTR6
Date: May 23, 2017 12:42PM

I have an oil leak that only appears after driving. The drips collect at the main case/tailhousing seam, but I'm not so sure this is the source.
Since the conversion is an assembly of items in "layers", the view of the transmission is poor at best. I removed and resealed the reverse light switch, but
have a curiosity about the "cap" that apparently covers the end of a main case spring post for the reverse brake. I cannot find an on-line
service manual that addresses this part, and wonder if any of the readers here can shed any light on the subject?
The reason I suspect the oil leak is not at the main case/tailhousing seam is there is no additional leaking when parked. However,
maybe that is due to the cooling of the transmission and oil? I would just tear into it, but for this installation, I have to take out the diff,
driveshaft, entire exhaust, interior, etc., and I don't want to!!
Thanks,
Dennis


IaTR6
Dennis Costello
Central Iowa
(125 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6

Re: Tremec T5 oil leak
Posted by: IaTR6
Date: October 15, 2017 08:16PM

So, after much searching, I believe my previously mentioned oil leak is coming from the "don't remove" reverse/5th pivot pin bolt.
Since this is a rebuilt trans, I must suspect the bolt was removed at one time, and not resealed. Does anyone have experience with the T5, and a recommendation for sealant? I do understand I'll have to open the trans to reseal the bolt.
Thanks,
Dennis


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5517 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Tremec T5 oil leak
Posted by: BlownMGB-V8
Date: October 15, 2017 11:30PM

Use the red anaerobic sealant, it doubles as locktite.
Jim


DiDueColpi
Fred Key
West coast - Canada
(1259 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Tremec T5 oil leak
Posted by: DiDueColpi
Date: October 16, 2017 02:07PM

You might not have to open up the trans Dennis.
Back out the pivot bolt a few turns. By hand if you can, so that you can feel when it binds. Then stop before you dislodge the clip.
Now you can take a small artists paint brush and paint on the anaerobic sealant that Jim mentioned.
Tighten it back up and you're good to go.

Cheers
Fred



Edited 1 time(s). Last edit at 10/18/2017 02:23AM by DiDueColpi.


IaTR6
Dennis Costello
Central Iowa
(125 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6

Re: Tremec T5 oil leak
Posted by: IaTR6
Date: October 17, 2017 01:38PM

Jim and Fred,
Thanks for the information, I am very appreciative. I am still working on a solution to my droning exhaust, and expect to have my latest
effort installed and tested soon. Then, if it works, I will go on to the transmission. I would be very happy if the sealing of the pivot bolt without
dissembling the trans works, and I will be sure to let you know the results.
If the trans must come out, I have considered changing to a 2.95 1st gear. I have a 3.54 diff ratio, and the 3.35 1st just seems a little low.
If the trans doesn't come out-then I'll live with the low gear.
Thanks,
Dennis


MGBV8
Carl Floyd
Kingsport, TN
(3361 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Tremec T5 oil leak
Posted by: MGBV8
Date: October 17, 2017 03:50PM

I would be looking for another T-5, if you want the 2.95 1st gear. Can't just change 1st gear. Input shaft & cluster gear at minimum. And, you are not going to like what that will do to 5th gear. ;)


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5517 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Tremec T5 oil leak
Posted by: BlownMGB-V8
Date: October 17, 2017 10:19PM

Turns out mine has a 3.27:1 1st gear apparently.
1st-3.27, 2nd-1.98, 3rd-1.34, 4th-1.00, 5th-0.68
TCET2057 = TKO @ 425lb/ft

I think it'll be OK.

Dennis, what are you doing about your exhaust?

Jim



IaTR6
Dennis Costello
Central Iowa
(125 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6

Re: Tremec T5 oil leak
Posted by: IaTR6
Date: October 30, 2017 03:04PM

Jim,
I built two "Helmholtz" resonators to go after the muffler. I have no X or H pipe, so needed a resonator in each exhaust pipe, and after the muffler as it is a Magnaflow "X" type. Not aesthetically pleasing, but perhaps black paint will make them less obtrusive. I need to resize the pictures, and then I'll update my project journal.
Carl is right about the changes to get the 2.95 gear. Input, cluster, and the lower 3 gears. Maybe $1000 plus bearings, and i don't have the press, so shop expense on top. It seems like the 5th ratio would then be .5 something, which is a little tall.
I'd still rather do this than collect stamps!
Dennis


IaTR6
Dennis Costello
Central Iowa
(125 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6

Re: Tremec T5 oil leak
Posted by: IaTR6
Date: October 30, 2017 03:42PM

I updated "Dennis' TR6" project journal for those interested in my resonator project.
Dennis


MGBV8
Carl Floyd
Kingsport, TN
(3361 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Tremec T5 oil leak
Posted by: MGBV8
Date: October 30, 2017 04:26PM



BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5517 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Tremec T5 oil leak
Posted by: BlownMGB-V8
Date: October 31, 2017 11:53AM

That's a lot like the ones Larry Shimp put on his car. I for one would like to see how you arrived at that volume.

Jim


IaTR6
Dennis Costello
Central Iowa
(125 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6

Re: Tremec T5 oil leak
Posted by: IaTR6
Date: October 31, 2017 12:52PM

Jim,
Here is how I developed my solution:
To determine the frequency, I used this formula: F=rpm of the droneX firing pulses per revolution / 60
Since the issue was at 2300 rpm, 2300X4/60=153.3 Hz Since this is an 8 cylinder, there are 4 firing impulses per revolution, and 8 in two revolutions.
A six would have three per revolution, and a four would have two. Both of those numbers would change the frequency, and resulting required volume.
At this point, a typical J-pipe length would be: speed of sound at the temp of the exhaust/freq, which would be 379.7/153.3=2.48 m.
And, if the J-pipe were for a 1/4 wave cancellation, I would have needed a .62m pipe, which is close to 24", and I just don't have the room for that.

So, going to an on-line calculator: [hyperphysics.phy-astr.gsu.edu]
I entered the temperature I found at my exhaust outlet (I did some guessing here, since idle would be cooler, and under load hotter).
I used a cheap infrared thermometer, and got a close enough value.
I chose 79C, which is 175 degrees F. In the calculation, this gives a speed of sound of 379.7m/sec.
I made a spreadsheet, and tried small tube sizes into a larger tube for 1 1/2 to 2 1/2' tube. Interestingly, a small tube into a larger seems
to result in the smallest required volume, so I chose a 1 1/2" tube into a 3" tube. selecting an 8" long 1 1/2" tube resulted in a required volume of
53.5 cu in. At 7.07 cu in per inch of length, I needed 7.6" of 3" tube for the resonant cavity. The fact that I have a 90 degree bend is not an issue, and in fact, I found an example of a round tube to a square volume and the two pieces were connected at 90 degrees. I was concerned
about the smaller tube bend, and did not choose a muffler shop bend, as that generally is a "crush" bend that would alter the tube inner
dimension and affect the frequency. I had to go online to buy the two mandrel bends, as the local shop wanted a 3-6 week lead time, and I'm too impatient for that.
Geez Louise, No wonder I got a blank look from the muffler shop when I asked about a Helmholtz resonator!
Dennis


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5517 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Tremec T5 oil leak
Posted by: BlownMGB-V8
Date: November 01, 2017 06:15AM

Yeah, those guys are generally not physicists.
Interestingly enough since this is not new science, I suspect that a fair number of the old muffler designs had resonators built in. All it took was an inlet pipe extended into a divider wall with a hole larger than the pipe. I can remember seeing those designs.

In fact, why not? I will be going to a rear exit system before long and there's nothing that says the chamber can't be concentric with the exhaust pipe.

Jim


IaTR6
Dennis Costello
Central Iowa
(125 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6

Re: Tremec T5 oil leak
Posted by: IaTR6
Date: November 01, 2017 11:41AM

Absolutely, in fact, I see several examples when I do a search for a resonator muffler. Too bad I went down the path I did.
Ah well, next time!
Darn chilly and overcast weather. I'm not ready to put the car away for the winter-Grrr.
Dennis


IaTR6
Dennis Costello
Central Iowa
(125 posts)

Registered:
12/29/2007 02:53PM

Main British Car:
'73 TR 6

Re: Tremec T5 oil leak
Posted by: IaTR6
Date: January 21, 2018 12:58PM

I have my T5 "rebuilt" transmission out of the car. Of course, since the driveshaft is one piece, and is within a tunnel, the diff has to come out first. Of
course, this requires disconnecting the axle shafts, and removing the entire exhaust system, and the interior transmission tunnel. I find the muffler shop
used a type of band clamp that has an "X" shaped center piece that puts an indent into the pipe that renders it a colossal job to separate!
Anyway, the "rebuilder" left the "Don't remove under pain of death" bolt finger tight, and without any sealant. Well thank you very much! I looked,
and I'm not sure you could loosen the bolt from the outside in order to apply a penetrating sealant such as Locktite 290 or some such. There isn't much room for error before the inner clip would come off, and then you have to remove the top cover anyway. I also have a failed input shaft seal, which fortunately didn't
allow oil onto the clutch (yet). I didn't want to do this job, but I'm through the hard part, and just needed to vent!
I do believe a competent rebuilt transmission is a cost saving, but my first one was filthy inside, and this one shows some level of carelessness in assembly.
Maybe purchasing from a reputable local rebuilder rather than ebay from some long distance supplier would be wise.



Charles
Charles Long
McDonald, TN
(162 posts)

Registered:
09/15/2013 08:54AM

Main British Car:
1966 MGB V6 1994 Camaro 3.4L 60V6

authors avatar
Re: Tremec T5 oil leak
Posted by: Charles
Date: January 21, 2018 08:19PM

Dennis, I could most likely say, that many of us have gone down the same road as you and learned cheapest is not always the least expensive.
Glad you on the mend and will soon be on the road.
Regards
charles


Charles
Charles Long
McDonald, TN
(162 posts)

Registered:
09/15/2013 08:54AM

Main British Car:
1966 MGB V6 1994 Camaro 3.4L 60V6

authors avatar
Re: Tremec T5 oil leak
Posted by: Charles
Date: January 25, 2018 10:11PM

My T5 is leaking a drop or two a month from the drain plug, so close I can not get the plug out to seal it. oops
Just going to drip I guess.
regards
charles


tbo
Tim Body
St Thomas Ontario
(187 posts)

Registered:
01/27/2013 06:47PM

Main British Car:
1954 Triumph TR2 stock 2 litre

Re: Tremec T5 oil leak
Posted by: tbo
Date: January 31, 2018 08:36PM

I've got a T5 question related to input shaft length. Myself and a friend are putting a T5 behind my stock TR2 engine and he has built a Triumph bellhousing to bolt up the T5.It's designed for the 7 1/8 input shaft of an 86 Mustang which has a 335 first gear and .68 fifth gear.I also have an 84 Mustang T5 with a 6 1/2 input shaft but with an even better 2.95 first and .63 fifth gear.The only other Ford T5 with the same gearing seems to be the 93 Mustang 1352 251. How can I find out if the input shaft is 7 1/8 in length and interchangable?Am I on the right track here??


mgb260
Jim Nichols
Sequim,WA
(1885 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Tremec T5 oil leak
Posted by: mgb260
Date: January 31, 2018 10:41PM

83 and 84 Mustang NWC T5 had the 2.95. The T5Z (Ford Racing aftermarket) was the only other one I knew about. First I heard of a shorter input shaft. Maybe some one swapped to a Chevy 6 5/8" input. Is there 26 splines for the clutch instead of 10? If that is the case you would need a Chevy clutch disc and Speedway Motor Ford to Chevy pilot bearing. Another thing to watch for is the bearing retainer tube. Ford and Chevy are different diameters and require different throw out bearings. The bellhousing hole is different diameter too.


tbo
Tim Body
St Thomas Ontario
(187 posts)

Registered:
01/27/2013 06:47PM

Main British Car:
1954 Triumph TR2 stock 2 litre

Re: Tremec T5 oil leak
Posted by: tbo
Date: February 02, 2018 10:29AM

Hi Jim. Thanks for responding. I should have been more precise and said the trans is an84 Merker or Capri ,I can't remember which which came with it's own bellhousing so it is all Ford.The guy used it behind a Ford small block.So maybe the question is ,,will a 83 84 Mustang NWC T5 295 inputshaft be interchangable in this transmission ? Or should I just sell this one and buy a Mustang 295 trans and be done with it ? Thanks


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