Crap, th350 emergency

[JP1738]

Ran great testing at Darlington last weekend, unloaded it today in Orlando to roll it across the scales and I have NO REVERSE. Trans is not low on fluid. It was a touch low when I checked it, I added about 3/4 of a quart, It's dead on now.

The car will snap into reverse and will pull itself backwards at an idle, but as soon as you give it some throttle to either back up over a hump or just go a little quicker, it just drives through the clutches and stops moving.

As far as I can tell, the forward gears have not been effected. It pulls hard at WOT in all 3 gears, but I was not able to make the test session today so I can't be certain it's still running as good as it was last week.

My question is, will the transmission be ok without reverse? Are there separate clutches that control reverse vs the forward gears? What could cause me to lose reverse?

Any input would be great. I'm asking around at the track as well.

[Eman]

What does the fluid look and smell like? Anyone have a pressure gauge? Sounds like reverse section is bad which means disassembly.

[JP1738]

Originally Posted by Eman

What does the fluid look and smell like? Anyone have a pressure gauge? Sounds like reverse section is bad which means disassembly.

I have not drained the pan, but what fluid is on the stick looks pretty good. I’ll run the car without reverse, but I don’t want to jeopardize the rest of the transmission by doing so.

[ss3011]

It would be great if you could hook up a pressure gauge to the line pressure tap on the transmission case. Jack the rear tires off the ground, put on jack stands. If the line pressure is consistent in first gear, 2nd gear , and third gear, say 160 psi . Check pressure in Reverse. If that pressure is lower than the forward range, you might have a leak in the Low/Rev clutch, but if the pressures are the same in the forward gears, you could probably run some time trials. If it won't hold WOT in 3rd gear then the Direct clutch has a problem. If all is well during forward operation during time trials then you could probably get through the weekend, but stay out of reverse. Good luck !

[BTR69]

I can't speak on a Chevy perspective with this, but back in the 90's, the 727 behind my 440 mopar lost reverse. lost 2nd as well. Still had 1st and 3rd though. Trash in the pan, looked a little bit like cardboard. Didn't have time to rebuild it before the bracket finals, so I changed fluid and raced it as it was. Picked up about .2 in the 8th mile.

[Mark Yacavone]

Not enough frictions in the lo/rev, or not enough lining left on the one's there.
You may or may not be leaving on the lo/rev and the forward. Depends on who built it.
If it has an auto 1-2 , then it should be on the forward clutch pack only.
In your situation ,I'd say try it pay close attention to low and high gear.
Find a place to drive in and out without using reverse, and hope for the best.

[Mark Ugrich]

In addition to the above , if it has a modulator check to make sure the valve isn’t stuck, Recheck to make sure the transmission linkage or cable is shifting fully into reverse.a pressure check will tell you a lot if you can do one.Its straining my memory, but i believe a stuck band can cause slipping in reverse too. Loose filter is a possible too.

[Pauley]

Well this my first post here and followed Ed Bigley aka 1290 because drr is dead since he left. That being said as Dawsons dad i do have a few things to say.

1 thank you everyone for your encouragement to him and well intended advice.
2 yall have no idea how hard dawson has worked on this stocker. He bought it with his $. Spent his time and many late nights doing every bit by himself. I helped very very little. Is it the nicest or best? Not by a long shot. But it is his and i am proud of him.
3 thank you 1290. You were his motivation to not give up at orlando. He said i will show up 1st round when others would have packed it in. So thank you 1290 for teaching him determination.
4 i have taught Dawson much about drag racing which he has done very well and i would put his talent up against anybody in any class no matter what equipment he is in. That said when he was 8 years old the best advice i gave him was this. God gave you 2 ears and 1 mouth for a reason. When you are interacting with people who know more than you do twice as much listening and half as much talking and you can learn from others.
5 i dont fight Dawsons battles. He is grown and makes his own way. 1290 was much motivation so props to Ed. He is still gonna be a friend to me. Heck i like him a lot.

Finally this. Thanks again to all who have offered him advice and encouragement. Even ridicule. He has learned many years of experience from you by listening. But i will say this. You all will have to beat him at some point because he is hard headed and wont quit.

ep

[GUMP]

Dawson, You have a PM.

[Keith 944]

Originally Posted by Pauley

the best advice i gave him was this. God gave you 2 ears and 1 mouth for a reason. When you are interacting with people who know more than you do twice as much listening and half as much talking and you can learn from others.
ep

You said that last year when we were talking, I love that quote I think we can all use that
You and I know he will be just fine. Looks like he is making a lot of friends and progress
See you soon!