What did you do to your Grand today (ZJ/WJ)?

[Adrian D]

I've used rubber bushings, too many people keep saying that stiffer polyurethane bushings hurt comfort and flex.
The polyurethane bushings I had in the trackbar did not last long and were actually softer than rubber for that application.
Maybe nolathane makes some higher quality bushings.
Superpro, for instance, brags about knurling on the inner side of the bushing to keep grease in. Just eyballing the nolathane bushings for the WJ, they seem smooth on the inside.

Front upper control arm bushings are the same on both axle side and body side.
Lower control arm bushings (round and oval) are the same on both front and rear.

[bodgie]

Originally Posted by Adrian D

I've used rubber bushings, too many people keep saying that stiffer polyurethane bushings hurt comfort and flex.

I'd heard that too, and I put off using poly bushes. Until one day I was sick of rubber bushes not lasting as long as I thought they should, so I bought some SuperPro bushes as I've used them before.

As for hurting comfort and flex, I'd go as far to say comfort/compliance of the ride is sufficiently improved. I also think the flex is as good, perhaps a little better but I haven't measured it.

Originally Posted by Adrian D

The polyurethane bushings I had in the trackbar did not last long and were actually softer than rubber for that application.

I've had the split polly bushes chew out in 10 minutes on my IRO track bar because the original fitment was loose. Adding a washer made a huge difference and the bushes have been solid since.

Originally Posted by Adrian D

Maybe nolathane makes some higher quality bushings.
Superpro, for instance, brags about knurling on the inner side of the bushing to keep grease in. Just eyballing the nolathane bushings for the WJ, they seem smooth on the inside.

The SuperPro bushes seem to work and are durable in my experience, however, you'll always hear someone who has a mate who installed them and they were crap.

Jason

[5oclock]

Thanks Adrian D and Bodgie for your responses,given me a few things to mull over before i start to rebush. On another topic, my AC needed regassing a while back and a guy i know had his regassed with Hychill30.Any way it worked out great,and it got me thinking about the jeep AC regas with the hychill.Turns out Hychill is propane-butane mix can get from Bursons and maybe Repco.It is a great substitue forR134a as it is compatible with the PAG oil used for 134a.So i got some prices but they seemed a bit high for what is more or less cleaned autogas.So i thought what the hell i will give it a shot with straight propane,and it has been great.The jeep workshop manual has a nice bit of info on high side and low side pressures verse ambient temps.I managed to get a nice set of manifold gauges off ebay for 50 bucks,made up a vaccum pump(to vac the AC system)from an old 240volt AC compresor(i think a old fridge comp will work ok too).Just have to be careful to retain any oil when you vacc(PAG oil is very hydroscopic.Since my AC was completely emptyit is legal for any one in Victoria to regass with hydrocarbon,has little or no greenhouse etc.Anyhow it has been great having a cold AC again and can regas any time now for next to nothing.I did do a bit of research on auto AC
before i went ahead, and obviously safety while handling flamable gas is a major issue.This is not a recommendation to do the same.Noticed on my new kitchen fridge that the refrigerant is butane.Hychill web site has charge weights for various cars in 134a and hychill30 and a bit of info on charging AC systems,interesting reading.

[Adrian D]

Originally Posted by bodgie

I'd heard that too, and I put off using poly bushes. Until one day I was sick of rubber bushes not lasting as long as I thought they should, so I bought some SuperPro bushes as I've used them before.

This kind of direct feedback is the best! Thanks.

Originally Posted by bodgie

As for hurting comfort and flex, I'd go as far to say comfort/compliance of the ride is sufficiently improved. I also think the flex is as good, perhaps a little better but I haven't measured it.

I'm curious to test, the bushings on my A-Arm are old (60k km) and I might just spring for some SuperPro ones.

Originally Posted by bodgie

The SuperPro bushes seem to work and are durable in my experience, however, you'll always hear someone who has a mate who installed them and they were crap.

Jason

Just from reading around, SupePro seem to be some of the best

[JeanLuke]

Added a sticker that I could not resist buying.

[Adrian D]

Speaking of CEL...cold weather + granny driving gives me P2502 occasionally
It might be the 2001 dated software in my TCM, a possible explanation is vibrations in the driveline influence RPM readings and the TCM thinks the transmission is slipping.

[5oclock]

Bodgie do you think Superpro and Nolathane are similar or is Superpro a better compound? Good point re the track bar needing the washer as a spacer. It looks to me that the design of the rubber oval bushings are always going to have play in them because of the voids.So the poly bushings would better for on road for starters.