drive line noise

Joined
Jul 22, 2007
Messages
184
Location
Alaska
I have a 70 fj40 with a SBC. Sprung over with Signaw P/S.

I understand I'mgoingtohave some driveline noise and viberations but I need to know if there is a way to reduse my noise. it souds like something is grinding when I decelrate. any suggestions would be great. also if I could see some pics of some simular setups and what works for you. thanks in advance
 

65swb45

Elder Statesman
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Apr 14, 2004
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If the noise is markedly different on decel, there is probably a problem that needs to be promptly diagnosed and fixed. Tell us what you've done so far.

Checked u-joints?
Checked pinion flange endplay?
Checked pinion backlash?
Checked driveshaft spline contact?
Checked tailshaft freeplay in the transfer case?
Checked/replaced trans/transfer/rear end fluids?

Makes it easier to get advise you can use. Course I suppose advise to check these things, if you haven't done so, is advise too.;)

Best

Mark A.
 
Joined
Jul 22, 2007
Messages
184
Location
Alaska
the noise is comming from the front driveshaft. I snapped a u-joint in the rear and drove it home in front wheel drive thats when I noticed the noise. I need to make a rear track bar so I don't snap another rear u-joint.
the noise only happends at high speeds and when I let off the gas. or going down hill at high speeds.

I'm running the 74 4 speed toy tanny and t-case
 
Joined
Jul 22, 2007
Messages
184
Location
Alaska
also completely rebiult the front out put shaft and all new 3rd members
 
Joined
Oct 31, 2003
Messages
5,025
Location
Meridian,TEXAS
the noise is comming from the front driveshaft. I snapped a u-joint in the rear and drove it home in front wheel drive thats when I noticed the noise. I need to make a rear track bar so I don't snap another rear u-joint.
the noise only happends at high speeds and when I let off the gas. or going down hill at high speeds.
I wouldn't worry about it, unless you plan on running it at high speeds on the front shaft only......
 
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