Question about motor mounts

HowardT64 · Post by **HowardT64** » Fri Jan 17, 2020 11:33 am

How easy or difficult is it to replace the motor mounts on my Wag?

Hspencer · Post by **Hspencer** » Sat Jan 18, 2020 7:10 am

Candymancan addressed this a few days ago in the “engine knocks under load” post. I would go with the prothane mounts as many have found that the stock replacements from box stores don’t hold up well. I would also replace the transmission mount while your at it. BJ’s, Team GW and summit have the mounts.

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Post by **fulsizjeep** » Sat Jan 18, 2020 7:55 am

Having gone with prothane engine and tranny mounts on my wife's 77 Wag, we noticed more drive train stiffness and noise than before. Just saying.

HowardT64 · Post by **HowardT64** » Sat Jan 18, 2020 9:48 am

Okay...thanks guys

Sounds like prothane mounts is the way to go....mucho appreciado

HowardT64 · Post by **HowardT64** » Sat Jan 18, 2020 9:52 am

Any thoughts on this?

http://www.bjsoffroad.com/Bolt-In-LS-En ... _1880.html

dodgerammit · Post by **dodgerammit** » Sat Jan 18, 2020 10:34 am

fulsizjeep wrote: ↑Sat Jan 18, 2020 7:55 am Having gone with prothane engine and tranny mounts on my wife's 77 Wag, we noticed more drive train stiffness and noise than before. Just saying.

Ah. This was my concern.
How much worse is it?

I wonder if the way I did the mounts in my T/A (recommended by LS1tech forum) would reduce the issue some?
Prothane motor mounts with rubber trans mount.

tgreese · Post by **tgreese** » Sat Jan 18, 2020 12:30 pm

You could use the soft rubber mounts and copy an old hot rodder trick. They would either put chain or cable across the mounts, or drill a hole through the insulator and mounts and put a bolt clear through them, left loose enough to allow vibration dampening.

Post by **fulsizjeep** » Sun Jan 19, 2020 8:20 am

dodgerammit wrote: ↑Sat Jan 18, 2020 10:34 am Ah. This was my concern.
How much worse is it?

I wonder if the way I did the mounts in my T/A (recommended by LS1tech forum) would reduce the issue some?
Prothane motor mounts with rubber trans mount.

I am not sure how I would gauge the difference. It is noticeable.

rocklaurence · Post by **rocklaurence** » Mon Jan 20, 2020 4:46 am

Just remember-dont mix Urethane and rubber. The Engine/Trans mounts should be made of all the same material/they flex at different rates.

dodgerammit · Post by **dodgerammit** » Mon Jan 20, 2020 9:26 am

rocklaurence wrote: ↑Mon Jan 20, 2020 4:46 am Just remember-dont mix Urethane and rubber. The Engine/Trans mounts should be made of all the same material/they flex at different rates.

Hmmm. I did at the advice of others on the LS1tech forum. This is on my T/A. It is done to lessen the harshness of the driveline vibration. Prothane engine mounts and rubber trans mount. 3 years, no issues.

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