does new gears mean upgrade the trani as well?

[bitchin_buick]

Have the 3.8NA- not tring to build a race car but thinking about throwing on some new gears( 3.42 or 3.73 ) do I have to update the torque converter? Is my rear-end or trani going to sound like it's gonna blow if I'm cruising a responsible 65 mph with the 3.73 gears and don't upgrade the torque converter? currently stock. TIA for your help!

 

[mikestertwo]

What transmission do you have in the car? What gears are in the car now? If you don't have overdrive I don't think it would be a good idea to go with bigger gears if your motor is pretty much stock. JMHO

 

[bitchin_buick]

stock 2.41 gears- stock 250 or 350 by lookin an my trani-pan bolt pattern.

 

[bitchin_buick]

Another member before said they went with 3.42 on a 3.8NA and it made a difference, but also suggested a T.C. upgrade. keeping the stock 7.5 gearbox. No need to go with the GN 8.5 gearbox. My engine doesnt produce that much power.