Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Motul on April 27, 2005, 02:57:09 PM

Title: Diff re-gear?
Post by: Motul on April 27, 2005, 02:57:09 PM

Hi guy`s,

Anyone got an idea of cost involved in re-gearing the diff`s on my 93` XJ??...... and would it be 4.56 Front and rear to run 31" tyres (with no risk of failure)??

Cheers

Andy.

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Post by: Anonymous on April 27, 2005, 03:03:23 PM

Assuming that the cost for an XJ is the same as a TJ, I have just been quoted:

Axle build up £250.00 + VAT
Ring & Pinion £245.97 inc VAT
Labour to remove and refit axle £175.00 + VAT

Axle build up price included putting in my own ARB locker at the same time

Labour did include fitting my own lower control arms and my own replacement shocks - so adjustments need to be made to price as you require less done.

I am regearing to currently run 33" but my last TJ with same gearing was on 35" with no problem - Dont know if XJ is same type of axle?

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Post by: greggmo on April 27, 2005, 05:22:46 PM

i wouldnt bother mate. chuck em on and see how you get on. i dont think you will need to regear.

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Post by: Woody on April 27, 2005, 07:02:02 PM

Agree with Greggmo most people only start to regear from 33" upwards.  Try it and see what the power feels like and if your fuel economy has dropped before deciding.

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Post by: Tank on April 27, 2005, 08:53:47 PM

Motul,my XJ runs on 32`s and as far as im aware,hasnt been regeared.The only real problem i have is when i go up hills,but only because for some reason it wont kick down when you put your foot down and nothing to do with the tyres :)  :)  :)

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Post by: Bubba on April 27, 2005, 09:41:15 PM

dont re gear just for 31s leave it as it is

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Post by: Mike Pavelin on April 28, 2005, 08:41:53 AM

On motorways It'll be screaming it's tits off on 4.56 and 31's. Wouldn't bother unless you intend going bigger later. If you have an auto with power/comfort switch, leave it on power, helps compensate for the 31's.

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Post by: Motul on April 28, 2005, 11:38:52 AM

Cheers you lot, so its "just" the money for the tyre`s I need to find, FEW!!

Tank, you sorted that prop ok mate ?

Thanx again guys  

Andy.

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Post by: Anonymous on April 28, 2005, 12:50:33 PM

Andy

let me know what tyres you fancy & i will see if i can get a deal off my daddy for you!!

Paul

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Post by: Tank on April 28, 2005, 03:33:27 PM

Props all sorted,half way through changing springs,got rear shoes to change and i still have a sort of grating noise from front when in 4wd.Thought it was prop but as i changed both,it rules that out.Will check fluids but i think it could be more serious though. :?  :?  :?  :?  :?

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Post by: Mike Pavelin on April 28, 2005, 07:00:39 PM

Andy, you'll have to change the gear on the speedo drive if you go to 31s or you'll be reading low.

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Post by: Motul on April 28, 2005, 07:23:51 PM

Paul - does your Dad deal with Greenway Tyres? as i was thinking of a set of 5 Macho`s, in 31.10.50R 15???

Mick - with the grinding noise, it does sound a little lube based, be nice for ya if thats all it is!!

Mike - hear what your saying mate, what`s that intail ? and how much d`ya reakon it`ll be out ?

ANOTHER ONE.......... I`ve rarely seen people going for bigger rubber on standard rims!! will I have to give the Jeep alloys some back spacers to allow for the extra circumference??

Sorry for the newb questions guy`s  #-o

Andy.

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Post by: Mike Pavelin on April 29, 2005, 08:52:52 AM

The speedo is generally 5% high as standard, 30" tyres tend to correct it to true MPH, 31s will make you read about 10% low. It takes about 10 min to change the gear, and they're £10-15 to buy.

31s are ok on stock 7Jx15 rims, you may get a little rubbing on the front on full lock, but you can adjust the lock stops out to stop this happening.

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Post by: Anonymous on April 29, 2005, 09:08:02 AM

Dr Mike
Who sells the gear for a TJ?

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Post by: Mike Pavelin on April 29, 2005, 09:28:20 AM

Jeep dealers or Lighthouse will be able to supply. look here for the correct one........http://www.gotjeep.net/speedo.html (http://www.gotjeep.net/speedo.html)
Should apply to TJ and XJ.

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Post by: Anonymous on April 29, 2005, 09:31:16 AM

Andy, you do know that Greenways are retreads???

I grew up in the tyre trade & I personally wouldnt want retreads for every day use on the road........they might be great off road but notoriously hard to balance for road use!

I have asked them to find out a price for you & also what sort of deals are about for new, branded stuff.........

Will let you know shortly!

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Post by: Motul on April 29, 2005, 11:23:03 AM

Hi KD, yes mate I did know they are re-treads, but at 50 odd squid each you cant go wrong really, and i`ve been running on Colway all terrain re-treads for 12mths now, and bloody things wont ware out!!  :wink:

Much respeck  

Andy.

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Post by: Motul on April 29, 2005, 11:26:02 AM

Mike - sorry dude, got carried away in that last post at thought of nice big MT`s to say cheers for your wisdom mate  

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Post by: Anonymous on April 29, 2005, 11:35:21 AM

Thanks for this Mike