I know that this has been addressed before, but I couldn't seem to find it in a search. Let's say that you have 3.42 gears and a 3k converter and you swap in 4.10's...what effect will the gear swap have on the converter stall speed? Would it go up a little, say to 3100-3200ish, or down a little?

 

the flash will go down a little.

 

Thanks Stew...if going from say 3.73's to 4.10's, do you think that the difference would even be noticeable?

 

nope. i didnt really notice anything when i went from 3.42's to 3.90's. but mine never really seemed to flash at 3200 anyway even when i went to a LQ4. i cant seem to find traction anymore either. nitto 420s FTL

 

nah you wont notice. i woulnt spend the money on a 3.73 to 4.10 swap. been there, done that and didnt notice a difference. step to a 4.30 or 4.56 or keep the 3.73.

 

couldnt agree more i did the samething and it was a waste of time and money, i was told if ya wanna make a difference to jump a gear

 

I've thought about that, but both of my diff's are injured anyway (front and rear....front carrier retainer clip must be broken in the front causing the diff to rock around and eat itself, and the G80 is blown in the rear), and need to come apart, so I figured that while I was in there I'd go up a step. I went from 3.73's to 4.11's in the past and noticed the difference...this was in a car though (1971 Camaro actually).

The 4.10's have been on my wish list for a long time now, and should be a near perfect match to my planned combo

 

Do 4.30's IMO

The engine/trans will translate a taller (lower numerically) gear ratio as more load on initial take off and the converter will flash a bit more to do the same amount of work, dropping the ratio (higher numerically) lessens the "load" on the engine/trans and the converter will not have to flash quite as much to move the truck the same amount....

It's very similar to the truck being loaded vs unloaded or maybe even with a small trailer behind it, depending on the gear difference.

 

Very well said.... You guys are good!!!

Chris

 

Excellent info here. Learned a bit more today. Ought to be a sticky. Thanx fellas.