Overheaing and Diff backlash

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roverdevin · #1 Post by **roverdevin** » Mon Aug 29, 2005 11:05 am

Hello,

I have been experiencing overheating problems on my 2.25 88", and am wondering if it could be my winch...Belleview 6000, same profile as the Warn 8274. For those of you who have mounted an 8174, does that resrict enough air to cause cooling problems? Mine is sitting fairly low, through the bumper as opposed to on top, so its only the motor that obsructs the rad. I am fine on most days, but on a warm day on a hard run (climbing) the temp pushes up toward the red line.

Also, I have a feeling the clunk in my drivetrain is caused by exessive diff wear ot incorrect backlash...how would I check/adjust this?

Thanks for any advice,

Devin Biln

ssortnarg · #2 Post by **ssortnarg** » Mon Aug 29, 2005 3:21 pm

this may be too basic to deserve mention -
but have you checked the "u" joints

roverdevin · #3 Post by **roverdevin** » Mon Aug 29, 2005 4:49 pm

Yup..U joints are newish, and free of any play. What I do notice is when I grip the prop shaft and try to rotate it (trans. brake off), there is a heck of a lot of rotation before the diff gears engage one way or the other, getting awfully close to 1/8 turn. I KNOW the diff has a lot of miles, but could this be a backlash problem, or a problem with the transfercase output play? I'm getting the classic drivetrain clunk when I change gears or as I give it more power after coasting/overrun.

Dev

DaveB · #4 Post by **DaveB** » Tue Aug 30, 2005 9:35 am

Hey Devin,

I have the 8274, mounted fairly high, and I haven't noticed any overheating. I did, however notice the truck getting really hot after Mackenzie Trail due to the gallons of mud stuck in the radiator baffles. It took 2 cleanings to get it all out and it seems to be better now.

Dave

roverdevin · #5 Post by **roverdevin** » Tue Aug 30, 2005 11:35 am

Gallons of mud? Sounds like a good trip! But thats a very real possiblilty...i'll take a look.

Thanks

Greg S · #6 Post by **Greg S** » Fri Sep 02, 2005 12:29 pm

I have noticed over heating caused by an incorrectly adjusted exhaust valve. Hard to beleave but true. I guess the valve wasn't opening enough to let all the combustion gasses out. It was only a couple thou under spec. Even with a good rad and water pump it still overheated when demand was high ie. long hill with heavy load.

derek n · #7 Post by **derek n** » Mon Sep 05, 2005 4:47 pm

8) Quote/"Also, I have a feeling the clunk in my drivetrain is caused by exessive diff wear or incorrect backlash...how would I check this."
/Quote
Ok guys you answered Devin on the engine heating up question but how about this second one? I'm also interested in the answer.
Cheers
Derek
'82 Lightweightairportablehalfton :wink:

Roverworks · #8 Post by **Roverworks** » Mon Sep 05, 2005 8:26 pm

You can not check the back lash without removing the diff unit. It can only be done properly on the bench. The manual covers the procedure adequately.

It often occurs that the motion observed when rotating the diff flange is erroneously interpreted as the back lash....More often than not it is wear on the outer or inner axle splines or the rear hub driving members that is being felt. It is surprising how many trucks have worn driving members which contribute to "clunking" on take off and premature axle snapping. Check them.

Alan
Rover Works B.C. Ltd
250-458-2447

The Rover-Landers of BC

The Rover-Landers of BC

Overheaing and Diff backlash

Overheaing and Diff backlash

drive train clunk

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