CUCV Needs OD

[vtblazer]

i think he meant with the 400 in it still and 36's it was not enough overdrive. that combo would be 2766 rpm's to run 65.

i am looking at putting a 700 in my m1009 for sure with some 4.56 axles and running the 37 inch hummer tires, since i have a few sets.

same on my m1008, although i may just go with 3.73's in the axles.

Okay, thanks for the clarification.

I'm running about the same combo in my 1st gen, to be installed this spring.
TBI'd crate 355 w/serp, 700r, 241 and 4:56's.
The 241 is where that decent crawl ratio really comes into play.
As mentioned, it will get me a 79:1 crawl and 1900rpm's on the highway.

I'll add this, it's a pretty decent web page showing alot of tranny info.
http://www.race-track.com/news.asp?TOPIC_ID=532

 

[ajbirken]

Not enough OD? Really?
According to the gear chart, a 700r, w/4:56 gears and 36" rubber should get you right around 1900rpm's on the highway @ 65mph but being a diesel maybe you want it lower still.
That combo will also get you out a 79:1 crawl ratio too.

Fourwheeler Jeff has it right.

I did not have enough OD with the TH400 and 36s (ie larger tires was not enough to bring down the rpms)

Sorry to be unclear.

I have the transmission and transfercase bolted in ready to go and I am waiting on some parts to get shipped so I can properly hook up the TV cable on the 700R4. After that I should be good to go until the transmission bites it. Then, I might put some big bank into a beefy 700R4 rebuild (only have $150.00 in the swap right now) or try to find something like a six speed allison.

adam