overdrive question

i have a '71 cj5 with v6 d18 looking at buying an overdrive. do i have the 26 tooth input gear and 6 spline trans shaft? and what is a decent price for one? used

 

i have the t-14 tranny

 

www.hermtheoverdriveguy.com

you should use a 10 spline 29 tooth I believe
check with herm
he's the man
oh, ebay, anywhere $450 up for the T14 unit
not as much demand

 

If it is a stock 71 with factory V-6 it will have a 10 spline output shaft.

 

I'm an F head guy, but IIRC, the stock V6 Jeeps were mostly geared 3.73 from the factory. Would you even want an overdrive?

 

not sure it just seems to be reving high rpm's at 60 even with the 3:73's and 33's that mesure out to a 32 1/2

 

what trany is a 6 spline?

 

all the rest
T14 is odd man out

 

sure your not hearing fan/fan clutch engagement?
roaring of the fan all the time?

 

i have had mine to 80 but never again. maybe fan but always looking at tach to see what it is at. even when i had electric fan it was same way. maybe making mountain out of a mole hill..lol

 

Could have the factory 4.88 gear option in it.

 

I don't feel good about paying $400++ on ebaY but that is the going rate. The problem I have is wear and tear. Even the slightest oil starvation can wreck an OD. Many used sellers may not be aware if there is damage inside when they let their T-case go too low.

If I ever get one, I will fork out the cash to Herm first and be confident I have a solid unit. Read up on Herm's warnings on the OD.

 

I can second that re the "unknowns" of Ebay ODs. I bought one from what was supposed to be a 4WDshop in TX that was in "Good Shape, ready to use" but in reality had set full of water for some time. They guy knew it because it came to me partially disassembled, and buggered up at that.

Off to Herm it went for a rebuild . . . All in all I think I had more in it than what Herm gets for his rebuilds. If you are seriously in the market, save yourself the grief and talk to Herm-

Eck

 

ok thanks guys. just thought an od would be a great option on my cj. but it is just as well that i did't spend the money. from what i've been reading from you guys is i don't really need an od with 3:73 gears. so i will just leave it alone

 

i got the od to install on mine as a gear splitter, as one gear is too low and next is too high. i alo plan on regearing down the road w/4.27's (or 4.88's if they can be found).

 

I had the OD with 3.73's and 31's. Never really needed it on the road - but it was kinda cool off road to split gears and stay in 4 Lo even if the trail opened up a bit.