hard to speed shift after replacing 5spd transmission

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04-04-2016, 07:35 PM

#11

1low03gt

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Join Date: Jan 2005

Location: Ontario

Posts: 17,778

I know remember what most guys were swapping too in regards to the fluid. GM Synchromesh Transmission Fluid.For the very reason what you are explainning.

Quote:

The best transmission fluid for T-5s and Tremecs. Sycncros will work better and provides superior lubrication compared to ATF.

Quote:

PRODUCT # GM12345349 FEATURES
-Popular for High Performance Manual Transmissions
-Recommended for Tremec Transmissions
-Semi-Synthetic Base Helps Withstand Extreme Temperatures
-Helps to Ensure Smooth Shifts
-1 Quart Bottle - Sold Individually
Superior Film Strength
GM Performance Synchromesh transmission fluid is recommended for all Tremec brand manual transmissions. This Synchomesh transmission fluid will make your T-5 or T-45 transmission shift smoother. Synchromesh transmission fluid prevents the thinning effects of mechanical shear for stable viscosity superior film strength and excellent anti-wear performance.
Application
GM Synchromesh protects against rust keeps seals soft for long life and is compatible with brass synchros for smooth synchromesh shift quality. Consult your owners manual for the correct amount of bottles needed.
Fitments
Ford Mustang - Recommended for all Tremec brand manual transmissions, T-5 and T-45