I hate this rear wheel hop!!!

[HotChickenStrips]

Any of you guys have any experience resolving the rear wheel hop on take off?

I'm not talking about aggressive launch but just regular, leisure driving, the rear end hops really bad, I can almost avoid it by slipping the clutch and feathering the gas.

Today I went to the shop and replaced the diff bushing with a Powerflex one (I can make a detailed how to with pics if you guys would like it) since the stock one was cut and also replaced the driveshaft coupler (I have another interesting bit of information about it) but no change in the wheel hop.

I aired the tired just as the manual recommends but it didn't help either.

Any suggestions?

[Entropyman]

My first guess would be shocks. Is there any clunking in the rear?

[1996 328ti]

Upper shock mounts?
Rear subframe bushings?

[BimmerBum]

How is tire ware in the rear? Might want to check those trailing arm bushings.

[HotChickenStrips]

No noise or thumping from the rear, shocks don't look bad, although I know about judging something just by looks, Bilstein and they look kinda recent.

Last night I ordered the RTAB's and rear subframe bushings as well from Ireland, also I'm fixing to attach my Gopro and record whatever is moving/flexing on the back.

[1996 328ti]

With polyurethane it may get worse.
I found the car more twitchy.

[BimmerBum]

Originally Posted by 1996 328ti

With polyurethane it may get worse.
I found the car more twitchy.

I thought that was the sub frame bushings you did not like? Most of the poly trailing arm bushings on the market are really not much harder than stock. As the trailing arm bushings are what keeps your rear wheels in proper alignment worn bushings can cause weird handling and increased rear tire consumption.

[jafoolii]

Sorry to butt in but as the convo has mentioned trailing bushed can some one show me where they are as im looking|needing to replace mine. Ive done e36 rear trailling bushed on 4 door chassis but as were aware the 318ti does have different rear setup than all other e36

[1996 328ti]

Originally Posted by BimmerBum

I thought that was the sub frame bushings you did not like? Most of the poly trailing arm bushings on the market are really not much harder than stock. As the trailing arm bushings are what keeps your rear wheels in proper alignment worn bushings can cause weird handling and increased rear tire consumption.

Well I changed everything so it's hard to tell.

My IE rear subframe bushings lasted several years until they disintegrated into a pile of polyurethane under by car. I'm so used to it now that I put in a new set.

The car sees less and less of the street these days.

[BimmerBum]

Originally Posted by jafoolii

Sorry to butt in but as the convo has mentioned trailing bushed can some one show me where they are as im looking|needing to replace mine. Ive done e36 rear trailling bushed on 4 door chassis but as were aware the 318ti does have different rear setup than all other e36

The trailing arm bushings on the ti are located where the trailing arm meets the sub frame. Think of the trailing arm as a 'V' with the point bottom point being where the arm meets the wheel (the hub) and the 2 top points of the V being where the trailing arm meets the sub frame... these 2 top points are where the trailing arm bushings are located. There are 4 bushings in total, 2 on each side. The sub frame goes across the car just in front of the rear wheels. You can easily visually inspect the trailing arm bushings with the rear wheels removed.

Hope that helps.

[BimmerBum]

Originally Posted by 1996 328ti

Well I changed everything so it's hard to tell.

My IE rear subframe bushings lasted several years until they disintegrated into a pile of polyurethane under by car. I'm so used to it now that I put in a new set.

The car sees less and less of the street these days.

I believe IE admitted to getting a bad batch of urethane a few years back. Reportedly that issue was resolved but time will tell.

I had to back off the stiffness of my rear shocks and sway bar on my E46 when I went to urethane and delrin differential mounts. Have your tried that?

[jafoolii]

Originally Posted by BimmerBum

The trailing arm bushings on the ti are located where the trailing arm meets the sub frame. Think of the trailing arm as a 'V' with the point bottom point being where the arm meets the wheel (the hub) and the 2 top points of the V being where the trailing arm meets the sub frame... these 2 top points are where the trailing arm bushings are located. There are 4 bushings in total, 2 on each side. The sub frame goes across the car just in front of the rear wheels. You can easily visually inspect the trailing arm bushings with the rear wheels removed.

Hope that helps.

Thankyou very much explained it very well. Now I know what im looking at

[anassa]

Originally Posted by BimmerBum

I believe IE admitted to getting a bad batch of urethane a few years back. Reportedly that issue was resolved but time will tell.

I had to back off the stiffness of my rear shocks and sway bar on my E46 when I went to urethane and delrin differential mounts. Have your tried that?

I have a set of IE subframe bushings on right now with their trailing arm bushings and I have had no problem with it, Its been more then half a year now.

Only complaint was that on install I didn't use enough lube/grease for the trailing arm bushings so its squeaky, but that is also my own fault.

[1996 328ti]

Originally Posted by BimmerBum

I believe IE admitted to getting a bad batch of urethane a few years back. Reportedly that issue was resolved but time will tell.

True. One of Ireland's guys admitted that. Jeff denied it.