I have a 66 Chevy pickup on a 85 blazer frame. The truck has 35" tires,a 6" lift and 410 gears. It has a 700r trans and I had it rebuilt and haven't been happy with it. It seems like 2nd gear is too high and the overdrive doesn't work now. I bought a used 350 trans and 203 transfer case do you think it would be better in this truck?
you should check the tv cable (throttle valve cable/ kickdown cable) it goes from the transmission to the carburator, a lot of people think that is just for passing but it is not. It controls your shift points and if it is not adjusted right it will not shift into overdrive, it will also shift to fast or to slow. If it is an old cable it wouldn't be a bad idea to just replace it they are only like 20 bucks or so. A 700r transmission is a good transmission especially in a four wheel drive, but they like to have that tv cable adjusted properly with clean tranny fluid and a good shift kit (about 60 bucks or so) would make a good difference. I hope this helps
depress the cable housing lock button at the throttle bracket on the intake manifold there and pull the housing as far back as you can, it may be difficult to depress the button so you may need ot use something like a screwdriver to push the button down pretty hard
let go of the button.
now open the carb throttle manually by hand all the way until WOT and see if the cable housing pulls forward with a couple or few click sounds
should be set correctly now
this only applies to 700r4 TV cables.
i recently set the cable on my 91 s-10 2wd pickup 700r4 and now it has good firm nice shifts like it should.
the 700r4 gotta have good quick firm shifts and not burn up clutch pack(s) quickly/prematurely. or break a hard part..
700r4 tv cable not set right = toasted burnt crispy trans sooner than later.. =(
first thing i do to a vehicle i buy with a 700r4 is set the TV cable. ive never had a 700r4 die on me and ive owned lots of them in all different conditions and different years and mileages.. the 91 i have now has 195k on it all original stock and shifting running perfectly no worries about it at all it runs as if it will go forever and ever. i use seal conditioner additive in my trannies also- especially the high mileage ones, or ones that have fluid that is anything except bright red and new-smelling!
yes, he is right about adjusting it. Tinker with the 700r for a little while before pulling it out of the truck. If you get working right you won't regret it.
If you can get the 700r4 to shift right, I'd stay with it. Is the T-case an NP208?
I have a TH350/NP203 in my '75 GMC. Its a solid, reliable combination (chain in NP203 does wear), but I sure do miss an overdrive. I have 31" tires and 4.10 gears (both are stock for my 3/4 ton) and I run about 3000 rpm at 60 mph. This is gets noisy, and doesn't do much for gas mileage.
The stock NP-203 is also full-time 4WD, with an AWD differential built in to the transfer case. The differential can be locked to give standard 4WD. This is great for snow-plowing, but for summer street use it would be nice to have 2WD. The 2WD conversion kits for the NP-203 come in two versions: cheap (but not reliable), or reliable (but not cheap).
I have a 66 Chevy pickup on a 85 blazer frame. The truck has 35" tires,a 6" lift and 410 gears. It has a 700r trans and I had it rebuilt and haven't been happy with it. It seems like 2nd gear is too high and the overdrive doesn't work now. I bought a used 350 trans and 203 transfer case do you think it would be better in this truck?
you will need to relocate the mounting cross members , the drive shafts will need changing do to the different lengths of the transmittin and t-case .
have fun
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