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[big g]

Would it be possible/advisable to do so for a facelift XJ.

My 98 XJ has rear bearing/brake issues and at best a front UJ on its last legs.

There is a local 00 XJ Td with H/G issues.

Would swapping both axles out be the way forward?

Any complications that the Birty's can foresee?

[sprintagogo]

A few issues to consider here.

High/low pinion front axle
Ratio
ABS
Dana/Chrysler rear

• The newer front axle should have a low pinion diff and this is a backward step, especially if your Jeep is lifted. If it isn't lifted then don't worry about it and go ahead and fit it.
• Your 4ltr auto? 98 Jeep should have 3.55 ratio axles if it is this engine/gearbox. The diesel will be 3.73 ratio axles so the change in gearing will be good to compensate if you have fitted slightly bigger tyres but no great change. If you do change the axles then you might want to swap the speedo drive gear to compensate.
• If you currently have ABS you will need to keep it if you want to pass an MOT or go through all the hassle of removing the ABS pump and altering the brake plumbing to suit. The diesel may not have ABS and depending on which rear axle it has it may not be possible to make them compatible.
• If the diesel does not have ABS then there is a slim chance it could have the Chrysler 8.25 axle which is a far stronger axle than the more regular Dana 35 (commonly known as the turdy five!). A Chrysler 8.25 from a 2000 year model will be the 29 spline type that is known as the best bolt in rear axle available in the UK. if it is the C8.25 you will need to use the U-bolts to fit the larger axle tubes.

I hope this information helps you.

[big g]

I hope this information helps you.

Yeah, that's a big help thanks.

Mine isn't lifted so the pinion hopefully won't be an issue.
Hopefully it will have ABS to avoid unnecessary plumbing.

I was thinking of putting the diesel springs on anyhows so they might lift me saggy bum.

[isle of man]

Chrysler 8.25 is the 2.5 petrol NOT the diesel - and I believe only the Grands has the HP front axle that is 17% stronger than the LP.

[sprintagogo]

Chrysler 8.25 is the 2.5 petrol NOT the diesel - and I believe only the Grands has the HP front axle that is 17% stronger than the LP.

All Grands have the low pinion axle and the XJ Cherokee uses the low pinion axle in 2000 and 2001.

I am not sure about the 8.25 axle usage although I must admit I got my 29 spline from a 2.5 petrol.

[Panic mechanic!]

I don't beleive ABS is testable on an mot, its only brake efficiency that is tested and ABS is a secondary system, the brakes still operate with or without it working, but I do understand it would be safer to remove the abs pump and piping if you did not use it.

[Mike Pavelin]

ABS is part of the test. The tester has to make sure the system warning light follows the normal self test routine on startup. Jf it doesn't, it fails.

[sprintagogo]

This is a total coincidence but I spent most of Saturday stripping out the ABS system from my Jeep. I dissabled the system nearly 12 months ago just after the last MOT so I could fit a C8.25 rear axle. Before I did this I contacted VOSA to make sure I would be able to pass an MOT once the ABS was dissabled and just as I suspected I was informed that the vehicle could be tested as non-ABS vehicle but only if the pump was removed. If the pump was left in place then the whole system must be operational (i.e dash light must light then extinguish and sensors must be present at each wheel. Anything else would be a fail!).

It is quite right that the MOT does not test the function of the ABS, simply relying on the dash telltale self-test light, but ABS is a definite part of the MOT test. My Jeep is at the MOT test station right as I type and when I dropped it off I told the tester that the ABS has been removed and that I have the notification from VOSA that it is still testable even without the ABS. I will be picking up the phone in about 20 minutes to see if it passed...........

[gordy]

Get underneath the diesel you are planning to have the axles off and check if it's high or low pinion. My 01 XJ TD has HIGH PINION front axle.

[Dave69]

The chrysler 8.25 is mainly on the 2.5 petrol engine jeep and doesn't have ABS. the 2.5 diesel comes with ABS (mk1 did) so should be ok for a swap into the 4ltr as well as the front axle. As Mike says the only MOT test for ABS is to see whether the check light goes out when the ignition is switched on. Depending on how picky the test station is they will pass a brake test if the required brake efficiency is reached regardless of ABS being connected or not as the ABS system is not a primary brake control. Ideally the unit should be removed but you will need to swap or alter the front rear bias valve to suit the swap to non ABS

[Grumpy]

I have a pair of axles from a diesel MK1, front Dana 30 and rear Chrysler 8.25, both 4.1 ratio, but they don't have the ABS parts.
I have been pondering putting them on to my 99 Mk2 and disconnecting the ABS as mention previously.
Only real issue I would have would be with the insurance company, anybody had insurance issues with removing the ABS??

[Dave69]

i've had no problem with AF over this as it doesn't affect the performance i.e increase engine power etc.

[sprintagogo]

I have a pair of axles from a diesel MK1, front Dana 30 and rear Chrysler 8.25, both 4.1 ratio, but they don't have the ABS parts.
I have been pondering putting them on to my 99 Mk2 and disconnecting the ABS as mention previously.
Only real issue I would have would be with the insurance company, anybody had insurance issues with removing the ABS??

Finding 4.1 ratio axles in a diesel is a bit of an oddity. It seems to be strictly 3.55 for the 4ltr auto, 3.73 for the diesel and 4.10 for 2.5 petrol. Are you sure those axles started life under the diesel Jeep? I am also insured with Adrian Flux and they didn't bat an eyelid when I removed the ABS.

I have just had a flick through my copy of the 2000 model year sales brochure and it shows that the diesel range only had ABS on the Orvis model as standard, the 2.5TD and 2.5 petrol did not come with ABS. The 4ltr autos have ABS regardless of trim.

Just to clear up something that may confuse people, the Chrysler 8.25 axle never had ABS fitted. If you have an XJ Cherokee with ABS then you have the Dana 35 rear axle (the later Cherokee/Liberty KJ has an ABS C8.25 axle with the sensor in the diff). The Chrysler 8.25 was upgraded with stronger axle shafts (from 27 spline to 29 spline) late in 1996 but stupidly the only way to tell which spline count you have is to pull one of the shafts out (a bit tricky!). If you get the C8.25 from the mk2 facelift model then it is fairly safe to assume it is the 29 spline variety.

[Bubba]

ok now i is confused i am glad i run a good old cj

[scrw]

If it is a diesel 35c without ABS it isn't difficult to fit the tone rings, they press onto the shafts, something i looked into for the ford 8.8 i was putting onto my XJ to keep the ABS system, I have a URL to someone who has done is somewhere.....

[The Smiths]

I have a pair of axles from a diesel MK1, front Dana 30 and rear Chrysler 8.25, both 4.1 ratio, but they don't have the ABS parts.
I have been pondering putting them on to my 99 Mk2 and disconnecting the ABS as mention previously.
Only real issue I would have would be with the insurance company, anybody had insurance issues with removing the ABS??

Those axles come from a 1998 facelift 2.5 petrol in the first place - then fitted to the 1995 Diesel.

One problem you will have with fitting the diesel axles is that the rear pinion yoke is larger on the diesel axles - so you will need to swap them over - not a big problem, just doing it in reverse as fitting SYE to mine and need the smaller UJ so that I can use the front prop

[Grumpy]

Those axles come from a 1998 facelift 2.5 petrol in the first place - then fitted to the 1995 Diesel.

One problem you will have with fitting the diesel axles is that the rear pinion yoke is larger on the diesel axles - so you will need to swap them over - not a big problem, just doing it in reverse as fitting SYE to mine and need the smaller UJ so that I can use the front prop

ah ha, now it makes sense, d'oh 

[Dave69]

the mk 1 2.5td ltd had ABS

[The Smiths]

the mk 1 2.5td ltd had ABS

The sport model did not have it fitted

[Dave69]

So the simple answer is yes you can fit them but you have to do both and the downside is that you might not have ABS

[garyf]

as previsouly said if you get a Dana 35 it is very easy to make ABS, just fit tone rings or change the shaft for some with them already fitted

alternative is sort the electrics so the MOt'er thinks its working

[Grumpy]

So if removing the ABS pump etc can you still use the master cylinder and servo from that set up or do you need to change it for one from a non-ABS vehicle??

[sprintagogo]

So if removing the ABS pump etc can you still use the master cylinder and servo from that set up or do you need to change it for one from a non-ABS vehicle??

Master cylinder and servo part numbers are the same for ABS or non-ABS so that is no problem. The proportioning valve is where the problems start as the ABS version has a port blanked that is used for non-abs set-ups. I got round this by swapping the prop valve from a non-ABS donor vehicle but I need to strip the blanking plug out and see if the blanked port is useable for one of the front brake lines.

[brian reid]

never mind taking out abs,just pull the abs light fuse,a lot less hassle and it will not come on during the mot,and your brake will still work ok,check your abs sencors you may have a goosed one for the light to come on,easy fix.,i took the fuse out a good few years ago and have passed 3 mots no probs,there looking for that light to come on,fuse out,end of problem.

regards

[Mike Pavelin]

It should also fail if the light Doesn't come on. The tester's checklist tells him if the vehicle should have ABS as standard so he should be looking for it.