Jag IRS Rear end- Why so hard to do? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 05-13-2011, 09:06 PM
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Jag IRS Rear end- Why so hard to do?

I am a newbie, I bought a XJ6 for the front end and would like to do the rear, but have heard that is it much harder to do. I dont need a step by step as I have found some (But you could always send me you faviroite site). I just really want an overview so I can charge ahead or go for some leaf spring easy swap.
Also if you still have a Jag waiting to be crushed, PM me as the first Jag I bought the wife fell in love with and is now a family member we cant cut up... So I need so little parts (seatbelts and stuff)
Charles in TX

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Old 05-14-2011, 06:59 AM
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What car?

What type of vehicle is it going in? It makes a difference on the level of difficulty.
Overall it is not a difficult project depending your skills at fabricating.
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Old 05-14-2011, 07:14 AM
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jag IFS and IFS

My son put a jag rear in his 22 dodge lakester, I bought the T bucket plans from CCR a few years ago The total set was $20 , The jag rear pages are only $ 5 I copied them and laminated the prints on card stock paper and used the optical tracer plasma cnc at the college to cut out the peces, there was mismatch, I don't know if the copy machine distorted them. I have 4 more jag fronts and rears in the shop . next time I will draw my own paterns and also use the cut up rear jag X member to make drill patterns. Jags are popular In the UK< New Zealand and Australia. some guys use the jag X members for an easy swap , depends on what you are putting the stuff into. A few regulars here on HR have used jags. There are a lot of picts and info on the HAMB site of Jag swaps. The last parts from the bone yard were $ 100 front or rear. we pull, even after a rebuild of brakes. a lot cheaper than getting out the credit card and 1-800 <<<The Jag has a dana 44- salsberry rears,big front brakes, and the look under a roadster.

Last edited by timothale; 05-14-2011 at 07:19 AM.
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Old 05-14-2011, 09:38 AM
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It is funny, I have always heard that a Jag rear is a fairly easy swap because of the way the whole suspension is held in a "cradle" which is attached to the car by just a few bolts: that way, you do not have to worry about mounting points for everything, you just install the cradle in your car.
As mentionned above, the Jag rear is very popular in the UK and has been installed in pretty much everything (Dodge van, T-Bucket, Mini...) so there is info out there.
Of course, if you plan on putting it in a car where the rear end is very visible (T-Bucket, for instance) you may not want to use the ugly OEM cradle... but you can use it as a starting point.
Also, on a sidenote, just in case, as much as the Jag rear is pretty strong, remember that the half shafts also work as the upper suspension arms, so if you manage to break the half shaft, the suspension and the car "fall": so avoid very high power application with stock half shafts, or add upper arms.
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