Bouncing in reverse

[jimm1009]

I have owned my M35A2C for two years now.
Since I have owned it it has bounced while attempting to back up.
Worse in high range and better in low range but still bounced.
Is this calssic drive line bind?
It is not too bad on flat paved surfaces but I was attempting to back into somones yard in town and his yard is about a foot taller than the street. Mild incline with gravel and the truck was pitching like a small fishing boat in rough seas.
I also had this happen when I was trying to pull my CUCV out of the mud a year ago by hooking to the front bumper and pulling out in reverse.
There is no abnormal slop in the ring and pinions in all three axles and no abnormal slop in the tranny or transfer case when the units are disconnected to put hand pressure on the driveshafts. All the gearboxes are tight in their mounts and no rubber mounts are missing or noticably worn. Leaf springs are all in really good shape and no worn shackles or broken leaves.
Is this typical for these trucks?
If so would a rear axle manual locking hub with shaft make a difference? If so it would make your truck two or four wheel drive depending on if the front axled is engaged Note, the truck has an air transfercase and there was no difference in the bouncing with front axle in or out.

jimm1009

 

[wreckerman893]

My guess would be a brake drum or the emergency brake binding.

 

[clinto]

.............emergency brake binding.

This has been my experience.

 

[gringeltaube]

http://www.steelsoldiers.com/deuce/53186-reverse-gear-deuce-surges.html

 

[Mister Sunday]

Giving it some throttle will help.

 

[glcaines]

Check the emergency brake first - it is very easy to check, and likely the culprit.

 

[halftrack43]

Yea , the only time I've had my m35a2 do that is when dummy me left the e-brake on. Binding brakes will do it!
Rick

 

[dcwilkie]

After replacing the wheel cylinders and cleaning the brakes and drums with brake cleaner, mine stopped "hobbyhorsing"
Just sayin'...

 

[jimm1009]

I acutally changed all the brake shoes, wheel cylinders, packed bearings what were good and change about 2/3 of them too.
Gone thourhg almost everything that I can think of. There is another post on this subject that I did not find on the search function.
Here is the link to it: http://www.steelsoldiers.com/deuce/53186-reverse-gear-deuce-surges.html
Let's continue there.
Thanks,
jimm1009

 

[snakehunter1964]

I had the same problem. Emergency brake was the culprit.

 

[DDoyle]

Air-shift transfer, or sprag type?

 

[emr]

I think he may be talking about how an M 35 is not very good at low speed take offs in my opinion they are not geared low enough and make a hop" when trying to pull or back up in tough situations, i have found experience is the only way to control this, and it sure works, practice is needed here..., its the driver ....and the truck, sorry But that is what i think u are experiencing