Welcome to the Corvette Forums at the Corvette Action Center!

Changing manual transmission fluid

DC/NH

Well-known member
Joined
Apr 1, 2002
Messages
48
Location
Deering,NH,US
Corvette
94 Polo Green 6 Speed Coupe
The car has 53K and is 13 years old. I thought I would replace with a synthetic, whats is the best way ...MTL, Amsoil? and what grade
 
S

Sunstroked

Guest
I used what ZF doc recommended. Its a fully synthetic motor oil made by castrol and imported into the states by bmw. They use it in there M5. Castrol TWS 10w60. You will not find it at any of the auto parts chains. Seems to be a bmw dealer only oil. I pd around 5.00 a qt. and you will need 2 qts. (2.2) to be exact.
 

G Winter

Well-known member
Joined
Aug 21, 2004
Messages
2,177
Location
NW Iowa
Corvette
1990 red convert 6 sp
Shortly after I got my 90 I changed the Trans oil. I don't know if it had ever been changed. I just put in Mobil 1 10-30 , it markedly improved the shift.It seemed as though it slowly got better for about a 1000 miles. Next time i will make the effort to get the BMW oil.

Glenn
:w
 
C

CAJUN C4

Guest
I used what ZF doc recommended. Its a fully synthetic motor oil made by castrol and imported into the states by bmw. They use it in there M5. Castrol TWS 10w60. You will not find it at any of the auto parts chains. Seems to be a bmw dealer only oil. I pd around 5.00 a qt. and you will need 2 qts. (2.2) to be exact.

I Agree
 

DC/NH

Well-known member
Joined
Apr 1, 2002
Messages
48
Location
Deering,NH,US
Corvette
94 Polo Green 6 Speed Coupe
Thank you all for your help. I have a local amsoil dealer and i can get to a BMW dealer if i go in that direction. I will have this done with my next oil change in a few weeks.
 

jrzvette

Well-known member
Joined
Feb 11, 2005
Messages
287
Location
NJ
Corvette
1969 RED SB COUPE, 1993 BLACK ZF6 COUPE
I will have this done with my next oil change in a few weeks.

If you're going to have someone do it tell him to make sure he can remove the fill plug before draining the oil. It's better to have dirty oil in there than none.
 

G Winter

Well-known member
Joined
Aug 21, 2004
Messages
2,177
Location
NW Iowa
Corvette
1990 red convert 6 sp
Very good point. I spent 4 hrs getting my fill plug out. There isn't all that much room there and they seem to seize.


Glenn
:w
 
C

CAJUN C4

Guest
Shortly after I got my 90 I changed the Trans oil. I don't know if it had ever been changed. I just put in Mobil 1 10-30 , it markedly improved the shift.It seemed as though it slowly got better for about a 1000 miles. Next time i will make the effort to get the BMW oil.

Glenn
:w

I wouldn't leave that in too long. Just my opinion. There's been a lot of research on this subject and Mobil10-30 was not a consideration.
 

Florida Guy

Well-known member
Joined
Oct 16, 2003
Messages
166
Location
Florida
Corvette
'96 Torch Red LT4
I copied the following 2 Q&A from the ZF web site.

Q: What type of oil do I need to use in my ZF S6-40 Corvette transmission?
A: ZF only recommends the following lubricant for S6-40 transmissions. The GM oil (available from GM with part number 1052931) and the Castrol Synthetic Formula RS 10W60 (available from BMW with part number 0751009420).

Q: What is the recommended service interval for my ZF S6-40 Corvette transmission?
A: The lubricant should be changed every 30,000 miles.
 
J

jdeatsch

Guest
the deal on ZF gearbox lube...

Ok. After a lot of research, cussing and discussing, (many thanks to many people who expressed their considered opinions on the subject) here's the bottom line.

GM had Pennzoil manufacture the lube they (GM) recommend for the ZF gearbox.

The GM part number WAS 12345349. GM no longer sells this product.

The Pennzoil product is:

Pennzoil Synchromesh Manual Transmission Fluid. It comes in a 1 quart bottle, familiar yellow Pennzoil packaging.

It's at Auto Zone, on the shelf.

I do hope this helps someone,

Jim
 

jrzvette

Well-known member
Joined
Feb 11, 2005
Messages
287
Location
NJ
Corvette
1969 RED SB COUPE, 1993 BLACK ZF6 COUPE
Ok. After a lot of research, cussing and discussing, (many thanks to many people who expressed their considered opinions on the subject) here's the bottom line.

GM had Pennzoil manufacture the lube they (GM) recommend for the ZF gearbox.

The GM part number WAS 12345349. GM no longer sells this product.

The Pennzoil product is:

Pennzoil Synchromesh Manual Transmission Fluid. It comes in a 1 quart bottle, familiar yellow Pennzoil packaging.

It's at Auto Zone, on the shelf.

I do hope this helps someone,

Jim

Just curious what Autozone charges. It's a lot easier to get to one of their stores than a BMW dealership. plus I don't have to venture into "foreign territory".:D
 
J

jdeatsch

Guest
Trying to remember...

I think it was under $5 or $6 each.

Memory is getting slack in my old age.

Jim
 

Corvette Forums

Not a member of the Corvette Action Center?  Join now!  It's free!

Help support the Corvette Action Center!

Supporting Vendors

Dealers:

MacMulkin Chevrolet - The Second Largest Corvette Dealer in the Country!

Parts/Accessories:

Vetteskins

Advertise with the Corvette Action Center!

Double Your Chances!

Partners

Top Bottom