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tips, technology, tools and techniques related to vehicle driveline components

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Hightower
Andrew Grindey

(2 posts)

Registered:
07/15/2019 10:17PM

Main British Car:


Borg Warner T5 Oil?
Posted by: Hightower
Date: July 15, 2019 10:24PM

I have an 1989 T5 gearbox from an 89 Chevy S10. I've just repaired it an need it filling with the correct grade of oil. It's a Non World Class transmission and I am getting loads of conflicting advice on what Oil I should use.

Is there any help out there?


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1083 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Borg Warner T5 Oil?
Posted by: ex-tyke
Date: July 16, 2019 08:47AM

ATF.
I've owned a '89 GM T5 in the past - the case had an OEM lube decal affixed that specified ATF


Anarchy99
Jim Purdy
Memphis, TN
(118 posts)

Registered:
12/06/2013 03:54PM

Main British Car:
61 austin healey sprite LS6

Re: Borg Warner T5 Oil?
Posted by: Anarchy99
Date: July 16, 2019 10:10AM

[forums.hybridz.org]

Good info for future searches that talks about some differences and reasons for the ATF.


Hightower
Andrew Grindey

(2 posts)

Registered:
07/15/2019 10:17PM

Main British Car:


Re: Borg Warner T5 Oil?
Posted by: Hightower
Date: July 16, 2019 08:38PM

I've done a little more research today. Looks like that when early T5's came out they werefilled with gear oil, but it would seem that since the late 80's the manuals for both NWC and WC state ATF to DexronII.

I'm a little worried about the brass synchro rings because my 1st ring was worn to excess which contributed to the 1-2 sliding gear reverse splines getting damaged meaning I kept throwing 1st. So I want a GL4 spec which is better for brass syncros, GL4 spec is used in gear oil but not in ATF.

I did however find a Redline product called D4 ATF, which meets and exceeds DexronII and provides a GL-4 level of gear protection. Even quoting suitable for T5 transmissions.

Unless I find anything more suitable in the coming days I will be giving this a go.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1083 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Borg Warner T5 Oil?
Posted by: ex-tyke
Date: July 16, 2019 09:39PM

Quote:
....1989 T5 gearbox from an 89 Chevy S10. It's a Non World Class transmission..
...so it's a NWC....so, it's not an '89 xsmn?


MGBV8
Carl Floyd
Kingsport, TN
(3761 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Borg Warner T5 Oil?
Posted by: MGBV8
Date: July 17, 2019 12:14PM

"GM started using WC boxes as early as 1988 in the Camaro / Firebird line but still kept NWC boxes in S-10's and Astro Vans. By the mid 1990's most of the GM T5 installations were all World Class."

[www.5speeds.com]


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