Don’t pull stumps...

[LINUS]

I like pulling with my winch, in neutral, standing on the brakes. Load on the transmission spooks me out.

Same. I use the E brake to act like I'm in park. Popping the parking pawl isn't on my "to do"-list.

I'd always hoped the driveplates were weaker than the teeth on the ring gear - clearly not.

 

[flintknapper]

Same. I use the E brake to act like I'm in park. Popping the parking pawl isn't on my "to do"-list.

I'd always hoped the driveplates were weaker than the teeth on the ring gear - clearly not.

^^^^^^^^^ Often....if there is a steady pull, no damage will result to either one. But what happens in 'real life' is that folks 'shock load' a component (jerk it) which creates a tremendous load.

 

[DirtScaresMe]

Same. I use the E brake to act like I'm in park. Popping the parking pawl isn't on my "to do"-list.

I'd always hoped the driveplates were weaker than the teeth on the ring gear - clearly not.

I've done a few winching pulls where my tires just drag towards whatever I'm pulling. Can't imagine that load on two pieces of metal 1" in thickness (ie: my transmission).

 

[mudgudgeon]

It should be required that new 80 owners read the first 10 pages of tech, completely, prior to using their 80 for anything other than Starbucks trips

Totally. Could lead to disaster if they haven't!

I mean, how would they know what cup holder is best!

 

[General Grant]

View attachment 1625350 Damned hard lesson but for $2,200. I’d take my dozer to Colingas and yank a few stumps out for you.

Haha thank you. I'm going to add you to my list in case I decide to rip out the 50 year old pomegranates.

It should be required that new 80 owners read the first 10 pages of tech, completely, prior to using their 80 for anything other than Starbucks trips.

Anything you can possibly FAWK up has been done by at least 10 others.

Don’t feel like too big of an idiot. At least you have a lot of company...

And, welcome.

My lack of attention span actually led me to skip those first 10 pages. Damn. It's a little painful, but I know i'm in good company!

What what Coalinga? General we need to hook up... I only know of two other 80s in my town here....

What's up Gary!

 

[Dirty Koala]

This same carnage doesn't even need to happen while in reverse. With enough weight, big enough tires and a steep enough hill you can shred the front 8" just by rolling down the hill using the engine as a compression brake as all that weight will be riding on the coast side of the gear just like it is in reverse.

I did this to my 4.88's...but I do have more weight than most with the 6BT and 37's

 

[Tools R Us]

This same carnage doesn't even need to happen while in reverse. With enough weight, big enough tires and a steep enough hill you can shred the front 8" just by rolling down the hill using the engine as a compression brake as all that weight will be riding on the coast side of the gear just like it is in reverse.

I did this to my 4.88's...but I do have more weight than most with the 6BT and 37's
View attachment 1626095

Looking at the witness marks on the carrier, may have had a bit of a pinion preload problem?

 

[flintknapper]

I did this to my 4.88's...but I do have more weight than most with the 6BT and 37's
View attachment 1626095

^^^^ And aftermarket gears...and a locker (if locked) can all make a difference. But your point it well taken, you don't have to have the transmission in reverse to load the coast side of the ring gear.

 

[-Spike-]

This same carnage doesn't even need to happen while in reverse. With enough weight, big enough tires, and a steep enough hill you can shred the front 8" just by rolling down the hill using the engine as a compression brake as all that weight will be riding on the coast side of the gear just like it is in reverse.

I did this to my 4.88's...but I do have more weight than most with the 6BT and 37's

Nope. That didn't happen because you engine braked down a hill. If the guy who set up those gears told you that to get out of making it right, shame on him. Besides that being ridiculous, the pinion doesn't engage the carrier case when you break teeth. The pinion engages the carrier case and you break teeth because the pinion is loose.

 

[Dirty Koala]

Looking at the witness marks on the carrier, may have had a bit of a pinion preload problem?

Yes most likely, I dont know who setup the 4.88's but the pinion was able to walk into the case. The moment of destruction however did come when the coast side of the gear was heavily loaded. I had Zuk setup my new 4.10's and Harrops...cryo treated them also...should be good now.

Nope. That didn't happen because you engine braked down a hill. If the guy who set up those gears told you that to get out of making it right, shame on him. Besides that being ridiculous, the pinion doesn't engage the carrier case when you break teeth. The pinion engages the carrier case and you break teeth because the pinion is loose.

 

[flintknapper]

Looking at the witness marks on the carrier, may have had a bit of a pinion preload problem?

Yes, carrier bearing pre-load too. We know the full cased carrier didn't flex, but not enough C/B preload will let the whole thing 'tilt'. Combined with a poorly set up pinion gear....would easily get into the case.