What Gear Oil to use in Gearbox/Manual Transmission!!ANSWER FOUND!!!!
#1
Senior Member
Thread Starter
iTrader: (3)
Join Date: Jan 2011
Location: Oxnard, CALI
Posts: 842
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1984 Z28
Engine: 5.0 L (Carbed)
Transmission: 5-Speed
Axle/Gears: Lazy 2 check
What Gear Oil to use in Gearbox/Manual Transmission!!ANSWER FOUND!!!!
So pretty much the way I came upon this was that I looked everywhere to find what kind of gearbox oil to add into my 5-speed z28. I came across a manual and it said in wright on one of the pages...here some piks and hopefully this helps some of you guys out there that are having the same problem as me....
and this is the manual that it from..
">
and this is the manual that it from..
">
#2
Supreme Member
iTrader: (8)
Join Date: Oct 2001
Location: Il
Posts: 11,731
Received 778 Likes
on
523 Posts
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: What Gear Oil to use in Gearbox/Manual Transmission!!ANSWER FOUND!!!!
Even tho they copy a lot of their info from the factory sevice manuals, I would rather trust the factory service manual from HELM, INC.
#3
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,125
Received 1,691 Likes
on
1,285 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: What Gear Oil to use in Gearbox/Manual Transmission!!ANSWER FOUND!!!!
Yup, pretty familiar stuff... I think everybody on here has that book and has seen that. As well as, of course, those of us that have the service info published by GM themselves, via their licensed publisher for service info, Helm Inc.
The factory waffled back and forth over what to put in there from year to year, depending I guess on whether the Gas Mileage Dept or the Warranty Expense Dept won that year's Big Kahuna Award at the spring Golf Scramble Outing.
Fact of the matter is, the parts themselves were identical in every way, right down to every individual part #, from the introduction of the T-5 through 87; and then, from 88 up.
So, you tell me: what difference does it make which fluid those same parts get bathed in? Are you going to believe, with a straight face, that the wrinkles in the sheet metal or the available sticker packages for any given year, affect those parts and that fluid somehow?
Bottom line pretty much is, put a non-volatile petroleum-based lubricant product in it. ANY such product will do, and has satisfied the warranty at one time or another.
In the couple dozen of those weenie POSs that I tore up before an alternative became available, I tried basically evey fluid known to man (and woman as well). I finally had the best luck with a mix of half-and-half ATF and 75W-90 Mobil 1. Didn't keep the trans alive any longer than anything else; didn't not leak out the stretched-out front countergear bearing hole any slower; and sure smelled worse than most other things. But it shifted the slickest with that combo.
The factory waffled back and forth over what to put in there from year to year, depending I guess on whether the Gas Mileage Dept or the Warranty Expense Dept won that year's Big Kahuna Award at the spring Golf Scramble Outing.
Fact of the matter is, the parts themselves were identical in every way, right down to every individual part #, from the introduction of the T-5 through 87; and then, from 88 up.
So, you tell me: what difference does it make which fluid those same parts get bathed in? Are you going to believe, with a straight face, that the wrinkles in the sheet metal or the available sticker packages for any given year, affect those parts and that fluid somehow?
Bottom line pretty much is, put a non-volatile petroleum-based lubricant product in it. ANY such product will do, and has satisfied the warranty at one time or another.
In the couple dozen of those weenie POSs that I tore up before an alternative became available, I tried basically evey fluid known to man (and woman as well). I finally had the best luck with a mix of half-and-half ATF and 75W-90 Mobil 1. Didn't keep the trans alive any longer than anything else; didn't not leak out the stretched-out front countergear bearing hole any slower; and sure smelled worse than most other things. But it shifted the slickest with that combo.
#4
Member
Re: What Gear Oil to use in Gearbox/Manual Transmission!!ANSWER FOUND!!!!
After being a factory technician for many years and seeing the ATF come out of my T-5, I'm gonna have to take a pass on the non-factory Chilton information provided.
#5
Supreme Member
iTrader: (8)
Join Date: Oct 2001
Location: Il
Posts: 11,731
Received 778 Likes
on
523 Posts
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: What Gear Oil to use in Gearbox/Manual Transmission!!ANSWER FOUND!!!!
I've always used this.
Thread
Thread Starter
Forum
Replies
Last Post
Navy8125
Engine/Drivetrain/Suspension Parts for Sale
4
08-21-2015 09:32 AM