Jimlab diff bushings
#1
Jimlab diff bushings
I have been doing some searching on differential bushing upgrade and i ended up buying the JIMLAB BUSHINGS Teflon bushings. Now i have them in my hand they the seem way two hard. I smack them together and they sound like a solid hard ceramic type of noise. I just wanted to get some opinions from guys who have them before i install these on my diff. I do no racing on with my FD except aggressive street and highway pulls I want to make sure these bushings wont be too harsh and wont give me vibration.
#4
Rotary Freak
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I have been doing some searching on differential bushing upgrade and i ended up buying the JIMLAB BUSHINGS Teflon bushings. Now i have them in my hand they the seem way two hard. I smack them together and they sound like a solid hard ceramic type of noise. I just wanted to get some opinions from guys who have them before i install these on my diff. I do no racing on with my FD except aggressive street and highway pulls I want to make sure these bushings wont be too harsh and wont give me vibration.
They are POS. Search under my avatar and you'll see why. Lesson #1 grasshopper: don't buy bushings designed by a Microsoft software engineer. Especially one whose RX7 has been on blocks for 12 years.
#5
Original Gangster/Rotary!
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The diff bushings from www.rx7.com work very well, highly recommended.
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#8
All out Track Freak!
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The diff bushings are fine but in my opinion for track use only. The driveline and tire noise is much louder, no slop at all but you must be smooth to avoid violent instaneous driveline shock.
I think Pettit Racing sells a similar diff bushing and they do not recommend them for any kind of street use.
I think Pettit Racing sells a similar diff bushing and they do not recommend them for any kind of street use.
#10
Original Gangster/Rotary!
iTrader: (213)
http://www.rx7.com/store/rx7/fddrivetrain_rearend.html
I've been running these for years and love them. Solid rear end, zero noise. My dad is having a set installed in his FD next week, and his R1 is a lightly modded street car.
#14
Rotor Head Extreme
iTrader: (8)
I have been doing some searching on differential bushing upgrade and i ended up buying the JIMLAB BUSHINGS Teflon bushings. Now i have them in my hand they the seem way two hard. I smack them together and they sound like a solid hard ceramic type of noise. I just wanted to get some opinions from guys who have them before i install these on my diff. I do no racing on with my FD except aggressive street and highway pulls I want to make sure these bushings wont be too harsh and wont give me vibration.
Install the bushings. You will be pleased with how much more stable the rear end will become. The differential isn't designed to move around. When the factory bushings start to wear, the rear diff will shift changing the rear suspension geometry making the vehicle feel less stable in cornering and acceleration. I've had these bushings 4yrs on my street fd. With stock exhaust, you will hear a slight rumble from the rear since your loosing the rubber isolation. But it's not loud at all and you will easy not notice it a day or so later. Just remember though, when you install these bushings, you will also notice any play in your differential assembly. It's more like a thump in the rear in on/off throttle situations. All this means is the shims in the diff need replaced and or adjusted. The stock fd does have this play in the diff, you just never notice it with the factory bushings. With the solid diff bushings you will if it's excessive. To check for this, all you have to do b4 hand is raise the rear and put on the parking brake. Then use you hand and rotate the drive shaft back and forward. Mine moves quite a bit. That's the play you will feel. I'm getting ready to remove mine shortly to adjust it.
#16
roti
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Sorry to derail, but does ANYONE know what happened to Jimlab's V-8 Monstrousity???
I searched but could not find anything. When I was more active on this forum, I think it had more pages than David Hayes' 3 rotor ordeal.
Thanks
I searched but could not find anything. When I was more active on this forum, I think it had more pages than David Hayes' 3 rotor ordeal.
Thanks
#17
Super Snuggles
Originally Posted by Fritz Flynn
...but you must be smooth to avoid violent instaneous driveline shock.
Dramatic sensationalism aside, anyone considering stiffer diff bushings should first check the condition of their motor mounts. Stiffer differential bushings will quickly reveal problems with broken or burst (they are liquid filled) motor mounts, which can be damaged by age and leaking oil. They should be replaced in tandam, since the drivetrain is supported only at the front and rear of the car.
Originally Posted by galgnu
Sorry to derail, but does ANYONE know what happened to Jimlab's V-8 Monstrousity???
#18
well i will compare both once my rx7.com bushing come in. Jim i should have done more research on these but the problem is that they feel so hard and sound more like solid porcelain when i knock them together. I could be wrong but i will see what happens.
#19
Ok a little update. I just received the rx7.com diff bushings and as "JIM"stated "they are exactly the same" . The only difference i see between the two is the material used (Teflon)vs(nylon)but the rx7.com bushings are just as hard as the jimlab bushings.
And to correct what i said before about the ceramic sound they make when i smack them together was only because the metal sleeves where inside. The rx7.com bushings make the same sound when i smack them together when the sleeves are in and when the sleeves are not in the bushings they sound like plastic.
The jimlab bushings look better than the rx7.com but i will take rich (GoodfellaFD3S) advice since he has been using these for quite sometime. thanks guys
And to correct what i said before about the ceramic sound they make when i smack them together was only because the metal sleeves where inside. The rx7.com bushings make the same sound when i smack them together when the sleeves are in and when the sleeves are not in the bushings they sound like plastic.
The jimlab bushings look better than the rx7.com but i will take rich (GoodfellaFD3S) advice since he has been using these for quite sometime. thanks guys
#20
Super Snuggles
when the sleeves are not in the bushings they sound like plastic.