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i have an 92 mustang 5.0 and my tranny broke, i heard i can put an 4 cyl one just with a diffrent pilot bearin?
but what i wanted to to know is that will my accelaration increase or will it get slower due to the gear ratios that change, i found a 4 cyl tranny out of a 89 turbo t bird or mustang, and just wanted to ask before i purchase my car right now just has E-303 cam with matching springs and rebuild heads, bbk shorty headers, no name h pipe, flowmaster catback, taylor spiro pro wires and 3.73 gears
I would be more concerned with the torque rating of your car vs. the rating of the transmission. The earlier T5's are weaker, 265 ft/lbs vs. 300 ft/lbs. You should be looking for a stronger transmission, not a weaker one with your engine.
Here's a summary:
1985, Ford introduced the World Class T-5 installed with 3.35 first gear set with a .68od behind the 5.OL. T-5 was also used behind both the standard 2.3L with a 3.97 first gearset and the SVO Mustang. SVO received a one year only 3.50 first gear ratio as the 3.97 gear ratio was too low for the added power of the turbo charged 2.3L. No longer were 1st, 2nd, and 3rd gears spinning on a solid output shaft as needle bearings were installed under each gear to reduce drag. The lower counter gears saw tapered bearings to replace the bronze thrust washer. All main shaft synchro's were fiber lined steel rings to improve rings friction surface while 5th remains bronze. By improving the surface friction the synchro slows the gear faster making for smoother shifts. The design remained the same until 1989. Torque rating remained the same at 265ft/lbs.
1990 to 1993 the stock Ford production V-8 WC T-5 was upgraded with stronger 3.35 gear set by increasing the nickel content to produce a harder, stronger gear. 2nd and 3rd gear ratios were decreased slightly tp provide more torque to the rear wheels. Synchro linings on 3rd, 4th were improved by changing from fiber linings to carbon fiber to further improve the friction surface resulting in better high rpm shifts. A longer throw shifter was installed to "make shifting easier". The speedo drive gear was changed from 7 tooth to 8 tooth. The 8 tooth was a step backwards when installing lower rear axle ratio greater than 3.55 as the driven gear is limited to 21tooth count. Yes, 23 tooth gears are available but do not last long as the teeth are thin and do not mesh correctly. Torque rating jumped to 300ft/lbs.
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