No they don't.
1 does 4.11 turns
1 does 4.14 turns
Unlocked the cdl will be running it different rates loading the cdl gears (weak area).
Locked the front and rear will be fighting the cdl and stressing it where it can fail.
No they don't.
1 does 4.11 turns
1 does 4.14 turns
Unlocked the cdl will be running it different rates loading the cdl gears (weak area).
Locked the front and rear will be fighting the cdl and stressing it where it can fail.
Ok so really the gears 4.10, 4.11, 4.12, 4.14 aren't interchangeable as stated by GBR based on that... i thought i made it clear when i bought them they were for the same vehicle and nothing was mentioned... HMMM!
Anyone know where i can source a 4.11 in Sydney that might have stock? I know LRA has the Ashcroft 4.12 (again, not interchangeable?), but i'm a bit pressed for the delivery time frame. Nobody makes a 4.12 Sals R&P as far as i know?
Get it in writing if you do fit them that GBR state it's ok...
I would be fitting a 4.11 reverse cut up front...
4.11 and 4.12 would be ok.
4.11 and 4.14 would stretch the friendship with your CDL
Fair call indeed... i shot off an email to GBR to confirm... i'll post back later what the outcome is :)
I have one set of ashcroft 4.11 new gears for a rover diffQuote:
Originally Posted by GoldCloverLeaf
The ratios are slightly different - which means that the front and rear prop shafts will not be turning at the same speed on average. Whether it is a problem or not depends on whether the speeds are is "close enough". The "problems" that may arise will be those associated with excessive wear on the centre diff - the bits that will be rotating relative to each other due to the speed difference are plain bearings. There may be also more windup when the centre diff lock is engaged as well, but this can be a problem anyway when the centre diff is locked on hard surfaces.Quote:
Originally Posted by GoldCloverLeaf
A separate issue is that using different ratios front and back will bias torque between front and back (the axle with the numerically larger ratio will have more torque).
However, while I have no experience of this with such close ratios, my feeling is that none of the "problems" will be more than those regularly encountered with different tyre wear between front and back.
John
.04 difference is 1.28 inches on a 32 inch tall tyre. I guess like running a 32 and 33.28.
Probably not ideal on a daily driver
Not on my calculator!Quote:
Originally Posted by uninformed
4.14/4.11 X 32 = 32.23. About a quarter of an inch. I do not think that would constitute a significant problem.
John
Hi
I've run an Ashcroft 3.50 reverse cut front with a 3.54 sals rear for over 4 years, and over 50,000kms. Not that different to your split.
No issues at all its about 1% difference in ratio with the circumference of a 31" tyre being about 2.5m, that's 1 revolution in difference every 250m or 4 turns a km.
The centre diff can cope with that front/rear split no problems and that mine is fine is OK. Its probably less than driving round and round a multi-level carpark.
There are some threads about this around and I the writers generally seemed to agree that it's OK.
The warranty is of course a separate matter for you to negotiate and conclude.
Clive