Engine and Transmission Tech

Trac-Lock and Power-Lok are competitors and the parts are not interchangeable. The Power-Lok is a heavier unit, has twice the number of spiders, uses all steel clutches and has two halves that bolt together with about 8 rather substantial bolts to compress the cone washers. No interchangeable parts.

I've not seen any Power-Lok clutches with 2 ears. That's Trac-Lock stuff.

You might try contacting these guys:

[www.justdifferentials.com]

Jim

yeah, its Trac lok parts I need thanks

Oh, well those are much more common, you should have no problems finding those parts.

Jim

Well, Ive finally found a company that can supply me a set of plates & clips @ £108/ $143, the seller has stated that I should use an oil additive that they sell, is this required? One other thing, what would you recommend re; oil+ additive? thanks



Edited 1 time(s). Last edit at 12/01/2020 07:16AM by soi6.

I use synthetic 75w90 and limited slip additive in my 44. Amsoil or Royal Purple are both good in my opinion.

For a posi, yes. I used to use the GM additive.

The oil additive is to protect the posi clutches and yes, it is required, although many axle gear greases already include them, and there is some argument that synthetic gear greases don't need them. Cost should be in the $5-15 range for about a 4oz bottle. Available anywhere, even car dealerships.

Jim

Thats for all the help on this, the supplier of the plates sells additive @ $18 so Ill buy that too.

Quote:

I should use an oil additive that they sell, is this required

Any wet clutch system has to use a friction modifier so that the plates won't stick together. eg. Wet clutches in motorcycles also have to have a friction modifier - my Yamaha, for instance, uses their formula "Yamalube" oil.
$18....wow, a bottle of Ford XL-3 friction modifier in Canada is about 5 - 6 bucks.




Edited 1 time(s). Last edit at 12/02/2020 09:38AM by ex-tyke.

Graham is the engineer here, not me. While posi clutches need to be able to slip when the car is turning, a wet motorcycle clutch is not quite the same. Don't want that clutch to slip when under power.

I have owned motorcycles since 1973. I have never used a motorcycle oil. Motorcycle spec oil has only been around 20 years or so. Wet clutches (motorcycles) do not need special oil. Just do not use any "Energy Conserving" motor oil that may cause clutch slippage.

I find that Rotella T4 (conventional), T5 (blended), or T6 (fully synthetic), all MA/MA2, rated in 15W40 gets it done for most of my bikes.



Edited 1 time(s). Last edit at 12/02/2020 02:01PM by MGBV8.

It doesn't have to be the high dollar stuff to do the job. Ford has used many trac-lock posi units, their additive is fine.

Jim

Quote:

....I have owned motorcycles since 1973. I have never used a motorcycle oil.

Standard motor oil has never worked in the any of my Yamahas without the clutch packs sticking together .....maybe that Tennessee snake oil has some secret ingredient.

Back in Muscle Car era, the LSD,TracLoc, Sure Grip or Posi required the Special additive to allow the clutches to slip and not try to lock during turning corners. Ford, GM, Chrysler and AMC had their own name for the additive, but all did the same function. Originally; GM used whale oil as their lube. Unsure what others used. EPA changed that and few other things.
Factory Service bulletins noted: Add the special oil when customer complained of noisy (popping) rear end when turning. Once added, you went to parking lot and made circles both directions to mix the lube and lubricate the clutch packs. Usually problem was solved. Ford additive came in 4 fl.oz, and smelled BAD! None of had a pleasant smell. My story and I'M sticking ti it. :-)

Quote:

Standard motor oil has never worked in the any of my Yamahas without the clutch packs sticking together

Must be that darn cold weather. Or, you aren't riding hard enough. ;)

Trail riding, street riding, motox & drag racing, I have never had any issues with motorcycle clutches.

For people living in the states be greatfull for the cost of parts, the plates & additive has cost me $174.50.....you lot are spoilt!

A bit late as I haven't been following this, but do Hauser supply these parts?
[www.hauserracing.com] They specialise in axle builds.

Do agree about the shipping and import duty, self-inflicted in my case as I chose to run an American car.

Ivor

Yeah i got the parts from them, I must say it was a PITA to get the plates into the carrier, not a job for some one that does not have some ability. But its looking good, & Im pleased with the outcome, thanks every one for your help!

Yeah, one of the down sides of the trac-lock. But they do a fair job once set up... until the plates wear. The first 10K miles will be good though.

Jim

Is that 10k of hard use or moderate use?

I think I'd have to say moderate but YMMV. With the weight of the MG you could get much more out of it. It is however a steadily decreasing effect and at some point the clutches will need replaced. The thing is, wear will occur even if you never spin a tire.

Jim