Reverse gear, deuce surges

[fuzzytoaster]

I want to know if others have had this issue before. When I had put my deuce in reverse low and let off the brake it began to go back smoothly at first. When she got a little speed, 3mph or so, she would wobble back and forth sounding like she would get ahead of the gear set then rebound and press against it only to be pushed ahead of the gear set again. This created a rocking motion and was very noticeable. This all took place on level ground too. Let me know if I need to clarify my words, thanks.

 

[Flyingvan911]

I drove a Freightliner Classic that did the same thing in reverse, low. I believe your rebound theory is correct.

 

[glcaines]

I've not had this occur with my Deuce, but I have had it happen with other trucks. There is a lot of elasticity in the drive train. I've been told that it is quite easy to snap an axle or driveshaft on civilian trucks if you get it springing back and forth too much, but I've never heard of this happening with a Deuce. I believe this is why many owners manuals for 4X4 pickups, etc. tell you to never operate in low range without the front axle engaged.

 

[fuzzytoaster]

I've not had this occur with my Deuce, but I have had it happen with other trucks. There is a lot of elasticity in the drive train. I've been told that it is quite easy to snap an axle or driveshaft on civilian trucks if you get it springing back and forth too much, but I've never heard of this happening with a Deuce. I believe this is why many owners manuals for 4X4 pickups, etc. tell you to never operate in low range without the front axle engaged.

My front axle was engaged, the switch was left in the "on" position and removed.

 

[coolnick73]

I noticed mine was doing the same thing the other day. I had it in low range, front axle DISengaged, and I wasn't giving it any throttle. I was on grass if that makes a difference.

 

[Unforgiven]

Push in the clutch. The harmonics will die down almost instantly. Let the clutch back out at a different engine RPM. Mine does that every time I back into the side of my house (uphill in avatar).

It starts out fine in the street. Then when I give it a little gas to get the rear wheels over the curb it starts the rocking stuff once it's over the curb. My old FJ landcruiser does the same thing in low.

 

[frodobaggins]

If you're riding the clutch, stop doing it. That can cause these issues. If you aren't, I got nuthin'

 

[nk14zp]

Push in the clutch. The harmonics will die down almost instantly. Let the clutch back out at a different engine RPM. Mine does that every time I back into the side of my house (uphill in avatar).

It starts out fine in the street. Then when I give it a little gas to get the rear wheels over the curb it starts the rocking stuff once it's over the curb. My old FJ landcruiser does the same thing in low.

Its harmonics.

 

[Billy Bobbed]

Mine does it in 1st trying to get it in 2nd some times.If it starts to rock its a crap shoot to get it in 2nd.Its judging clutch release and the throttle.When the truck pulls good in 1st it goes in good.It seems like its got a lot of slack in 1st.I get a little rock in reverse.

 

[gringeltaube]

I want to know if others have had this issue before. .......................................

YES, a very common problem, even after swapping in a depot-rebuilt motor with a brand-new clutch.....!
Live with it until you finally decide to service the clutch and find out that both surfaces - pressure plate to flywheel - had NOT been working exactly parallel to each other! (very noticeable uneven wear, 360º around)
I think that especially heavy vehicles with a short axle ratio and using a metallic pad 5-spoke clutch disc (typically our Multifuel Deuces), do react extremely sensitive to a faulty pressure plate or a poorly machined flywheel.

G.

 

[Mister Sunday]

Give it a little throttle, it will smooth out.

 

[jimm1009]

I started my own thread because this one did not show up in the search.

Two (or three) questions. Does a bobed deuce also have this problem of rocking back and forth in reverse?

Has anyone gone to the forward axle disconnect on a standard deuce and found some relief from this surging?

I guess that I need to pull the transmission to gain access to the pressure plate and flywheel and have them trued up as is suggested here.
Of course I would add a new cluth pad and throw out bearing for GP.
Is the bushing in the crank a good thing to replace at this point and time too?


jimm1009

 

[doghead]

I thought you scrapped your truck.

 

[fuzzytoaster]

I thought you scrapped your truck.

Yes but this issue hasn't been covered before or at least showed up in search, and it appears others have the same question too.

 

[Stretch44875]

My M35 does it, but not bad. Only idle reverse. I don't worry about it. Sounds like the governor loading down and revving back up to me.

 

[Heavysteven]

Mine does it at first, the idles the truck back smoothly. I think engaging the engine at idle may be the reason.

So.......still have Deuce fever. Thought you were set on that jeep(CJ4).