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Bad luck or I screwed up?

black rust

black rust

1/2 ton status
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Jun 29, 2007
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Beecher, IL
The trans(700r4) in my k5 went out soon after I bought it. I blamed it on the PO's rebuild, since reverse started slipping pretty much the moment I got it. So I grab a JY trans, get it swapped in, and I have no reverse. Same exact thing, trans just slips. I can move forward fine, no slippage at all. So is it possible I installed the trans wrong or do I just have bad luck and got a already broken trans?
 
THe governer could be bad. I belive it was the 700s that if they went bad, you loose reverse and eventually 1st gear.
 
I would get another word on it too...but from what I've learned form here, and school. It's just a wear thing. Common, not too hard to replace.

If your looking at yuor tranny there should be a circular can, held on with a metal clamp (like old master cylinders) it's inside of there.
 
I think I know what your talking about. Once I fix this I will get reverse back or do I still need a different trans?
 
If the governer is bad, then yes you should get reverse back.

Do a search, I know avery's thread about his tranny had some good tech and troubleshooting hidden in it's millions of pages.:haha:
 
Remember that a misadjusted TV cable will kill a 700R4 very quickly.
 
Well 4x4 said it best. If you check the governor you should be able to pull it out easily. There's a way to check it but i just can't quite remember. Any tranny tech should tell you what to do.
 
Well the reverse was gone before I even moved the truck, so I don't think a misadjusted TV is the problem, but see if I can make sure it's adjusted correctly.
Looks like I've got some searching to do.
 
Alright, I'm working my way through Avery's thread, but in the meantime I had a question. The trans I got still had the TV bolted to the trans, all I did was clip it onto the throttle bracket. It is adjusted on the trans end or the throttle end?
 
Well I checked the governor today and the plastic gear looked fine so that isn't my problem.
When you say a misadjusted TV can kill a trans very quickly, how quickly? I've moved the truck less than a couple hundred feet since the trans was put in, would that be enough to do it?
 
Do yourself a favor now, and start looking for a 400 or 465 to keep in your basement till the 700-R4 dies. I was very happy I did
 
doubtful. it took me a month or two to kill mine with the misadjusted cable.
 
Is there anything else that would cause this problem other than reverse being burned up? I'd love not to have to pull the damn thing again
 
The only thing i can think of is reverse is just burned up. Hard to believe it happened to 2 trannys but it is possible
 
In a last ditch effort to avoid swapping the trans again, I tried one last time to get it to work. When I shift into reverse, the engine acts like its still in neutral, but if I let the truck idle in reverse for a while, it bogs the engine down for a second and jerks the truck a little bit, then goes back to doing nothing. Every once in a while it will do this.
Does this sound more like a bad governor or I lost reverse. Just to double check, the governor is fine if the plastic gear isn't stripped right? Or can some other part go bad?
 
Torque Converter???

Something to look into as this happened on my Brother's 4x4 Van. He converted to an automatic transmission from a manual. At that time he also bought a torque converter with a slightly higher stall speed (per the transmission shop's advice). I told him that lower was better (NOT higher) as he would want to torque for towing and such. Anyway, with that converter he could BARELY back-up on level ground, and he would just sit there if there was even the slightest incline behind him. I finally got him to call Summit Racing (as he would not call a converter company directly...??) and they sold him a new converter with a lower stall speed. Now everything works perfect!! Now I cannot say it had anything to do with the converter's stall speed, but replacing the converter with a new one did fix his reversing problem. On a side note, the original converter was built for him by the transmission shop that built the transmission
 
I don't think the converter is a problem. The truck moves forward easily. I actually have the idle set a little too low so sometmes the truck bogs down too much in first gear, but reverse does nothing at all.
 
Well my Brother's van moved forward without any problems. He could drive all day and it was fine. Acceleration seemed normal.... nothing out of the ordinary, but when he went into reverse the van would act like it was in neutral or the transmissions was slipping a lot. If the van was on the SLIGHTEST rearward incline he could rev the engine really high and there would be no rearward movement. Reverse on level ground was very minimal. He drove it like this for over a year. It was not his daily driver but he drove it at least a few days a week. Anyway we were stumped. The transmission checked out fine by another transmission shop. Only after he switched out the torque converter did he actually have a "working" reverse.


You are saying that you put in two transmissions and they both had no "reverse"?
 
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