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The 1988 GM service manual specifies "Syncromesh Tranmission Fluid" GM part number #12345349 for both the Getrag and Isuzu tranmissions. It is available from any GM parts shop and from most general automotive parts stores.
The GM specification No. is 9985648. It is a "Gear Lube - Special" by API standards
Your safe bet is to use a lube that conforms to GM specification No. 9985648. Multiple suppliers make transmissions lubes to this spec: QUAKER STATE®SYNCHROMESH FLUID
PENNZOIL® SYNCHROMESH FLUID
AMSOIL Synthetic Manual Synchromesh Transmission Fluid Others transmission lubes may also work just fine. For your application they may be better or worse than a spec 9985648 lube. If you have non standard applications, such as heavy towing or high RPMs you may want to examine:
Red Line D4 ATF; Red Line MTL
Valvoline Durablend ATF
Amsoil ATF
Mobil 1 ATF
What else can I help you with?
How do you check transmission fluid on 1987 manual transmission?
there is no fluid for a manual transmission
What fluid is used in a 1996 Ford manual transmission?
You can use any SAE certified manual transmission fluid in your 1996 Ford manual transmission. Make sure you use manual transmission fluid and not automatic transmission fluid.
Where do you check transmission fluid level on a Saturn with manual transmission?
I dont think manual transmission cars use transmission fluid.
What kind of transmission fluid do i use for 94' ford Ranger manual?
Manual transmission fluid is MERCON automatic transmission fluid.
What kind of fluid does a 98 ford escort manual transmission take?
You can use any SAE certified transmission fluid in your 1998 Ford escort manual transmission. Make sure the transmission fluid is for your manual transmission and not an automatic transmission.
Where do you add transmission fluid in a 1994 Ford Explorer with a manual transmission?
Where do I add transmission fluid to a 1994 Ford explorer with a manual transmission?
How to Check transmission fluid on your 95 camaro manual 3.4?
you cant check the transmission fluid on any manual transmission
What type of transmission fluid does a manual transmission use in a 2002 mustang?
According to the 2002 Ford Mustang Owner Guide : 3.8 liter manual transmission fluid ( Motorcraft MERCON automatic transmission fluid ) 4.6 liter manual transmission fluid ( Motorcraft synthetic MERCON automatic transmission fluid )
What type of fluid is used in a 1992 C1500 manual transmission?
Synchromesh Manual Transmission Fluid
What type of transmission fluid do you put into a 1998 ford explorer with a manual transmission?
Motorcraft MERCON automatic transmission fluid in your 5 speed manual transmission
Where is the dipstick transmission fluid to a 1993 mustang with a manual transmission?
No dipstick on the manual transmission , fluid level is checked underneath the car at the transmission fill plug
How do you put transmission fluid in a manual transmission?
The transmission fluid is added where you check it, on the toppish left (driver's) side of the transmission.
