Thread: Puma Gearbox, transfer case rattle when coasting

check the parkbrake and output splines on the rear output shaft.

Hi Blknight,

Thanks for that quick reply. What should I look for with the splines? wear, damage or manufacturing fault?

Tieds

Possibly also oil on the park brake shoes too.

JC

Mine did that too! Went back 4 times, and they adjusted the handbrake to the point it would almost hit the roof when you put it on, but still sounded like the brake was dragging and catching. Then they loctited the pinion flange on the rear diff, and it's not done it since. (Well I think the handbrake is still catching but because there's no slop in the shaft you can't here it any more...)

So the final fix was to loctite the diff pinion flange.

Originally Posted by tieds

Hi Blknight,

Thanks for that quick reply. What should I look for with the splines? wear, damage or manufacturing fault?

Tieds

theres about 8 things that you need to check out..

1. propshaft to flange nuts but you'll be taking those off to check most of the other things, inspect the studs when you take the shaft off off for fretting. (do the same for the diff side)

2. backing plate contamination near the drum

3. drum mounting screw

4. correct torquing and fitment of the nut that holds the flange to the output shaft (this is also the bit that has the splines under it that you need to loctite up and is the same setup as on the rear diff)

5. out of round on the drum

6. shoes correctly fitted and clean

7. shoe pull in springs and contamination of the shoe seats

8. backing plate mounting bolts

9. cable security

10. correct fitting of the anchor blocks to the backing plate.

as a side a dying UJ can also ring up through the parkbrake and the tcase.


Im still astounded that a basic parkbrake configuration thats been working fine for more than half a century can all of a sudden be gotten so wrong.

I would say dragging handbrake

Thanks heaps for this detailed reply. I read also in another forum of the possibility of diff lock up, is that a possibility do you think?

A quote from the other forum:


This might be obvious but have you shifted the transfer box whilst moving? If so run in low come to standstill clutch, neutral, clutch, high, roll on gently might reset the transfer gearbox wind-up. I had a heavy knocking after a spin in low-range this sorted it and transmission and diffs now silent again.

Be good if my problem is this simple to remedy, so I'll try that and then go on to Dave's options. Once again, Thanks