Why didnt thay build?

[St.Louis-Dart]

Well maybe thay did but i never herd of one...a 727 with a 4th gear OD was there any big block 440 New Yorkers or anything
automatic with overdrive....what year did car makers start with the overdrives?....sure would be cool to run like 3:91 gears and have that
overdrive for the highway...what about ford and chevy do thay have any older autos with od?

[Ed]

They only got into lock-up converters at the end of the 440 run in '78 and it was a lot cheaper to run a 2.23 rearend the redesign a tranny.  About the best you can do is adapt a newer style tranny to an older case or hang an overdrive setup on the tail. 

[fasttcars]

Well maybe thay did but i never herd of one...a 727 with a 4th gear OD was there any big block 440 New Yorkers or anything
automatic with overdrive....what year did car makers start with the overdrives?....sure would be cool to run like 3:91 gears and have that
overdrive for the highway...what about ford and chevy do thay have any older autos with od?

the basic overdrive 360 tranny will bolt up[with patern adapter].....i'm not positive but somewhere in the mid to late 80's that's when thay cam out...it's been done on a couple magazine articles....but alot of guys around here use them on their 60's sb cars without a problem..

[cu440da]

I did notice Kiesler now has auto OD's for big blocks. Don't know what they're based on, but it doesn't look like a 727/904.

[W2-408]

Think its based on a GM 4L60 with just a different bellhousing

[Jim_Lusk]

Nobody cared much about fuel mileage until 1973 with the first gas crisis. The US automakers had a little too much momentum in large inefficient cars that it took several years to turn things around. This was compounded by the first of the restrictive emissions regulations.

[xmattxxx]

 Yep that keisler unit is AWESOME looking,i checked out a display model at moparfest.Running a 4:11 gear on the street and having overdrive in a big block a body would have the chevy boys in the corvettes shitting thier pants in a stoplight duel

[dangerdawg]

didn't some mid 70's police, state highway cars, have an overdive added to the rear of trans?

[Jim_Lusk]

They didn't need it. The 69 Polara pursuit was clocked at nearly 150mph in stock trim.

[1967dart406]

They didn't need it. The 69 Polara pursuit was clocked at nearly 150mph in stock trim.

  back then from what ive read the cop cars were more of a force to be reconed with than the actual street cars

[fasttcars]

They didn't need it. The 69 Polara pursuit was clocked at nearly 150mph in stock trim.

  back then from what ive read the cop cars were more of a force to be reconed with than the actual street cars

of course you can take a guy that's normally vary tame behind the wheel put him in a uniform and he will drive like a wild man....and having a big block mopar under his control didn't help the situation.........

[BBLM23]

I worked on an ex-police diplomat. It had a blocker for 1st on the shifter linkage...

[DaBigNuttedMan]

In the 50s didnt ford make a car with an auxiliary overdrive, I remember that a pull of a cable actuated it might not have been a ferd not sure.

[Jim_Lusk]

Now that you mention it, yes there were overdrives available in the 50s, but those engines were not high revving and needed the OD.

[DaBigNuttedMan]

Now that you mention it, yes there were overdrives available in the 50s, but those engines were not high revving and needed the OD.

A friend just called me and wants to move some dead cars as he has many, he says one is a 38 chrysler that features a overdrive

[ssracing]

i wish they all would go back to large inefficient cars

[St.Louis-Dart]

saving gas is only a small reason id like overdrive in my 3:91 383 dart..i dont like the unnessary wear and tear when just
crusing around town...both my car&truck shift to Od at 40 mph and you can coast 500 yards to a stop light..were the dart
your giving it gas till 100 feet to a red light for no reason...anyone here shift to neutral just to coast down a long hill?

[6pkScamp]

Does anybody have any info on the coversion kit offered by www.transmissioncenter.net? How much of a beating can they take?

[jamesdart]

I worked on an ex-police diplomat. It had a blocker for 1st on the shifter linkage...

mine had that. i never did find it. used ot piss me off. i tired adjusting the shifter linkage several times thinking WTF!

[CheapStreet Duster]

growing up and visiting my grandfathers livestock farm.
he had a old willis Jeep..with 2 transmissions ...one behind the other...
My grandrather only had one arm...and he would cut down trees and drag them out of
the woods with the truck just idleing in gear..it would creap soo slow.. santa2
he would get out and manipulate the logs or what ever he was pulling.
and the jeep would just idle along very slowly...with no one at the wheel..
we used to drag a large piece of R/R track steal behind it to dress the gravel road out in front
of the house.. he would let me drive...i would just put it in 2nd gear and pull out on the choke lever for a high idle....
the thing would tool along at walking speed....
you could put it into low-low and walk to the house have a drink and a sandwich and the thing would bearly be half way accross the field headed back to the barn...

id consider the gearvenders overdrive unit in a heart beat...they bolt right onto a 904 or 727

cheapst.