Anyone running 2.73's with a 700R4???

[y2k_harley]

I recently bought an 83 GMC 2wd parts truck with a 305/700r4 and 2.73 gears.  I wanted to swap the 700r4 in to my 86 2wd which also has 2.73's.  My question is if there is any issue with the convertor locking up in overdrive.  I had a 4x4 suburban with this combo (don't ask why I had 2.73's in a 4x4)  and 31" tires and I could never get the thing to lockup in OD.  Later on I want to go to a 3.42 or 3.73 rearend but want to know how much trouble it would be driving with the 2.73's.

[Grim 82]

Sounds more like a lock-up problem. Your torque convertor shouldn't really care what your final drive ratio is.

[ohio hab]

Had the same combo originally in my 84 C-10 and had no problems with the convertor locking up. I now have 3.73 gears, also with no problems. Sounds like the previous post said you have another problem.

[y2k_harley]

It would lock up on occasion, just wouldn't stay locked up.  I just figured the RPM's were too low (about 1350 or 1400 if I remember correctly).  Most of the time I just ran in drive and the RPM's were around 1900.

 

[Captkaos]

My current 87 R10 has a 700R4 and 2.76 gears.  It does fine and it has stock height tires on it.

[square81]

I had the same set up. Works ok but was lazy and rpms were too low. Changed to 3.73 made the world of difference.