Hi everybody! Ready to fill my 4 spd Muncie So, GM synchromesh or the friction modified stuff? Is there a difference? Is there a specific number of what I should be buying? I know to get 3 quarts as the trans takes 2.8 quarts roughly. I see GM synchromesh in eBay for 9.79 a quart. I won't use the penzzoil I will surely use the GM but I want to make sure I am buying the right stuff Thanks guys ! Louis
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY "My mind spins like helicopter blades." -G. Rossdale ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT 3800sc series 2 swap in progress ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 VIN #5835 Stock PRV engine Peugot 604 Intake manifold Exhaust headers Anti-3rd brake light
Apparently the fluid is the same...just the names are different. Here is a quote from the 'BobIsTheOilGuy' site.
" AC Delco Synchromesh Transmission Fluid" ... General Motors Canada Part # 89021808 " AC Delco Synchromesh Transmission Fluid - Friction Modified" -GM USA Part # 10953509
Difference between the above is labelling to meet national standards.
GM Friction Modified - #12377916 is an old part # and the above replaces it.
The MSDS for the above lists the product as "Shell MTX Fluid", and that is confirmed by Shell documentation.
Shell documentation shows is also sold by Chrysler dealers as "SYNCHROMESH TRANSMISSION FLUID" Code 1874 MTX Fluid; MOPAR Part # 4761526
The fluid is a popular recommended MTF in Getrag transmissions, Honda, and Mazda 5 and 6 speeds. Users generally report better shift feel at all operating temperatures and better low-temperature performance at cold-start.
How do I tell if my 85 four speed is limited slip differential or not?
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY "My mind spins like helicopter blades." -G. Rossdale ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT 3800sc series 2 swap in progress ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 VIN #5835 Stock PRV engine Peugot 604 Intake manifold Exhaust headers Anti-3rd brake light
That's interesting that the fluids are the same. I thought the FM fluid was extra "grippy". I guess not. No Fieros came with a limited slip differential.
There is a friction modifier additive that comes in some diff oils, it prevents the clutch plates from chattering in turns. It's also used in construction equipment that uses wet brake systems. Older Skytraks had to have 4 ozs of modifier per hub or the brakes would chatter so bad it would shake the machine.
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY "My mind spins like helicopter blades." -G. Rossdale ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT 3800sc series 2 swap in progress ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 VIN #5835 Stock PRV engine Peugot 604 Intake manifold Exhaust headers Anti-3rd brake light
Pennzoil Synchromesh works well in the 5sp Getrag. Find it at most parts stores, about $8.99 (Advance Auto). You need two 32oz bottles for the Getrag. Should also do you well in the Muncie.
PENNZOIL® SYNCHROMESH MANUAL TRANSMISSION FLUID Pennzoil® Synchromesh Fluid is a manual transmission fluid designed for certain manual transaxles and manual transmissions used by General Motors or Chrysler. Pennzoil® Synchromesh manual transmission fluid is formulated with high-quality paraffinic base stocks, a fluidity modifier, multifunctional performance additives, corrosion inhibitors, a foam suppressor and a shear stable viscosity index improver additive. It provides excellent oxidation stability, low-temperature performance, excellent synchronizer performance and compatibility with yellow metals, such as bronze, brass and copper components found in manual transaxles and transmissions. Synchromesh manual transmission fluid will satisfactorily lubricate General Motors or Chrysler manual transaxles and transmissions from -40 C to +150 C.
[This message has been edited by Kevin87FieroGT (edited 06-02-2015).]
