Xfer case gear noise
- Thread starter PCFRover
- Start date
D
Disco Mike
Guest
You might want to change the oil and add some Lucas to your t/case, won't repair it but it will quiet it down and the t/case will last longer.
Make sure to check for metal in the oil when you change it.
Mike J.
Make sure to check for metal in the oil when you change it.
Mike J.
Could be impending mainshaft spline failure as well. It usually creeps up as gear whine that gets noisier and noisier, and is only heard under load as described. You may want to pull the PTO cover and peer in there. If you have an automatic ******, its not a horribly costly repair as it is if you have a manual gearbox, but still somewhat involved.?
PCFRover said:
The output shaft on the automatic transmission (ZF design, not Rover) is not the correct length or spline count to interface directly with the t-case input gear, so Land Rover bolts an adapter to the auto ******?s output shaft, that converts it to the spline patter and correct length to interface with the input gear in the t-case. As such, when you experience the spline wear issue with an auto ****** truck, you pull the t-case off, replace the input gear (done without having to disassemble the t-case) and replace the output shaft adapter on the ******. When you have a manual transmission (Rover Design), the output shaft is the correct length, and correct spline count to interface with the t-case input gear (by design). The problem is that once the output shaft splines on the manual gearbox are buggered, the entire output shaft must be replaced, which means stripping the transmission down, and rebuilding from the ground up (Think of the mainshaft as essentially the manual transmissions backbone, it runs through the entire transmission. So the mainshaft wear issue on a manual requires overhauling the entire manual transmission, in addition to replacing the input gear in the t-case, verses unbolting an external adapter and bolting a new one on with the automatic ******.
Check this page by Steve83 for some photos of the spline wear issue, he apparently just did an overhaul on a D-90 with this same issue?
http://www.supermotors.org/registry/vehicles/detail.php?id=2742&s=20366#content
So Scott your saying that on an automatic you DONT have to remove the tcase to change the input gear and tailshaft? Just remove the PTO cover? That would be nice!
sven95lwb said:
No, Unfortunately not. You can replace the Input gear in the t-case without removing the t-case, but to replace the output shaft adapter on the ZF Auto Transmission, you still need to pull the t-case. Still, alot better solution than having to pull the transmission and rebuild it.
My 95 was noisy, I recommend you either perfrom the fix described in previous responses to your post, or install a slinger to deliver oil to the upper input shaft. I did not learn about these options until my Xfer stuffed, then it really made a lot of noise. I have a Xfer case from a newer model (97 I think) and it's wisper quiet.
Slinger you say, please do tell, what is a 'slinger'? We must all have noisey boxes, so I am assumming noise means impending issues, but to halt further damage, a 'slinger' sounds like a possiblity.
Thanks
Thanks
JEEPETR said:
OK - I may be talking out of my butt here, but I am doing so under the hopes that you are wrong:
Looking at the rear of the T-case there is a sewer-cap with bearing races that holds the Input gear in place. Like you mentioned, I have been able to pull the input gear assembly out by pulling in a twisting motion with the trans in "N" and the TC in "N". Actually quite elegant.
Regarding the output shaft adapter, it would seem that you could put the trans in "P", reach in wtih an extension, and pull that puppy off. Once the center bolt is removed, it slides off like buttah. Slap in the new shaft adaptor, twist in the new input gear, seal it up and go.
Any reason why this would not work?
Also - what is the cost of the adapter shaft and input gears?
Thanks!
and another question to Jeepeter:
So, If I pull the PTO cover off, I should be able to see the condition the 'Transfer Mainshaft Gear', right? This gear is the one that has the 'Intermediate Shaft' running through it.
Yes?
Is this the gear you are referring to?
I would be very glad to hear that Curtis' question rises a 'yes' answer instead of dealing with lowering that stupid X-fer box. But I bet the answer will be no since new shaft seals for the intermediate shaft.
So, If I pull the PTO cover off, I should be able to see the condition the 'Transfer Mainshaft Gear', right? This gear is the one that has the 'Intermediate Shaft' running through it.
Yes?
Is this the gear you are referring to?
I would be very glad to hear that Curtis' question rises a 'yes' answer instead of dealing with lowering that stupid X-fer box. But I bet the answer will be no since new shaft seals for the intermediate shaft.
Lutzgaterr said:
It seals (twice actually), but is only under pressure while the transmission is operating. By this point the trans fluid is in the sump. It seems like a possibility that you may get a little seepage once you pull the shaft, but you will have the new shaft on in less than 15 seconds. Any drips can be drained from the TC.
Lowering the T-case is not all that hard. I will say that it helps to have a proper mount to help balance things out. That is one heavy SOB.
Not quite what I was referring to Curtis. I was referring to replacing that stupid O-ring on the intermediate shaft, but ooopps, we are not dealing with the 'intermediate shaft'.
Now upon closer inspection of the Rave diagram, looks like the 'extension shaft' from the ****** inserts into the 'transfer mainshaft gear'.
I feel rather stupid on this one... Hence, the extension shaft & Transfer Mainshaft Gear, the wearing down of the connecting splines is the cuase of our noise and future issues.
Now, do I have that right?
Now upon closer inspection of the Rave diagram, looks like the 'extension shaft' from the ****** inserts into the 'transfer mainshaft gear'.
I feel rather stupid on this one... Hence, the extension shaft & Transfer Mainshaft Gear, the wearing down of the connecting splines is the cuase of our noise and future issues.
Now, do I have that right?
Lutzgaterr said:
Yeah - that is right. I will admit that I am not very clear on how it could ruin the transmission though. Seems like the worst that could happen is that you get stranded because the splines eventually strip. I guess the other possibility is that the splines might get jammed which could set up a resonance that might shake up the governor assembly causing pressure issues. Who knows.
Jeepetr - you still around? How about pulling off the extension shaft like I suggested? Would it work?
Bump - just looking for a more educated response to my questions:
"Any reason why this would not work?
Also - what is the cost of the adapter shaft and input gears?
Thanks,
"Any reason why this would not work?
Also - what is the cost of the adapter shaft and input gears?
Thanks,
B
beemer
Guest
Transfer box oil leak, spline check by dealer (bastards)
While under the 100,000 warranty the dealer changed the o-ring on the intermediate shaft, they did a check on the transmission output shaft spline and gear. They said it was the "upgraded" gear. Now at 93,000 miles the spline stripped , gear spline at 20% left, warranty is up and i take it in the ass. This is on a 95 D1 5-speed. Extended warranty paid out over $13,000 in 7 years. Now the bucks on me as i'm rebuilding it myself, can't sell this crap vehicle that can't move on its own. A electrical fire sounds better every day.
While under the 100,000 warranty the dealer changed the o-ring on the intermediate shaft, they did a check on the transmission output shaft spline and gear. They said it was the "upgraded" gear. Now at 93,000 miles the spline stripped , gear spline at 20% left, warranty is up and i take it in the ass. This is on a 95 D1 5-speed. Extended warranty paid out over $13,000 in 7 years. Now the bucks on me as i'm rebuilding it myself, can't sell this crap vehicle that can't move on its own. A electrical fire sounds better every day.