205 transfer case mounting?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Firebirdjones · 12-30-2009, 09:24 PM

Anyone have pics of the aftermarket poly mount kit for the 205??

I ordered one (still waiting) and I'm a bit confused. As it lists the adapter mount as well as some sort of torque mount.

On our blazer all I see is a mount at the transmission/transfer case adapter. I don't see anything resembling any type of torque arm. Could it be missing something??

I do have a driveline "thud" when you come to a stop, and take off again. I'm sure it's related in some way. The original rubber transfer case mount has seen better days.

swyfor5 · 12-30-2009, 09:44 PM

Right on, the transmission mounts are the two adapter mounts that bolt to the crossmember. The torsion mount bushings mount the side bracket to the T-case and the frame on the passenger side. I got my poly set from LMC.

Firebirdjones · 12-30-2009, 10:19 PM

Quote:

Originally Posted by swyfor5

Right on, the transmission mounts are the two adapter mounts that bolt to the crossmember. The torsion mount bushings mount the side bracket to the T-case and the frame on the passenger side. I got my poly set from LMC.

Hmmm, that's where the confusion is. I have no such side bracket on the T-case to pass side frame.

Got a picture of what this looks like? I have this sick feeling I'm going to have to find one.

msgross · 12-30-2009, 10:44 PM

some 205's didn't have the mount. Do you have to large threaded holes on the lower right side of the TC? This is my rockewell tranny but it has the same toque mounts...

a clunking sound is more than likely U-joints...

msgross · 12-30-2009, 10:46 PM

here's the mount that bolts to that area..

jaros44sr · 12-30-2009, 10:55 PM

Should look something like this, but it not assembled in the right order

swyfor5 · 12-31-2009, 04:33 AM

Yep, that's the mount. From what I can tell some guys run it and some don't. I am going to run it when I swap out my Dana 20 case for my new NP205.

*2tons of fun* · 12-31-2009, 04:50 AM

most 205 dont have them. they stopped use them at all in 72/73.

you dont need them. but you do need to look at all your ujoints, motor bushings, shock bushings, drive shaft splines, pinion yoke, axle u bolts, there is a ton of stuff that can cause a thud.

Firebirdjones · 12-31-2009, 12:41 PM

Ya mines a 72 and evidently didn't come with this mount. Guess I'm going to have some poly bushings from the kit I don't need. I'll crawl under it closer today and look for mounting holes. I would like to add the mount anyway if someone has a spare forsale. Thanks for the pictures too.

Thanks for the ideas guys, here's what I know so far.

The thud isn't the U-joints. Hard to describe but it does it under braking right before you come to a stop. It doesn't do it getting on and off the gas, you have to hit the brakes and be near a complete stop, then it will thud.
Upon acceleration it will thud, but not always in the same spot. Sometimes it will do it as soon as you hit the gas, sometimes halfway through first gear, sometimes it does it on the shift to second gear.
Just depends on how aggressive with the throttle you get. Feels more like something is shifting back and forth. Something heavy.

Motor mounts are fine, shocks are fine. The entire suspension has all new poly bushings on all the springs, as well as every body to frame mount bushing replaced with poly. Arizona's dry climate is hell on rubber parts

U-joints I replaced a few months back, but not for the clunking reason.

Basically everything on the truck is poly with one exception. The transmission mount. And it needs replaced, I can pull chunks of rubber off with my fingers. Which is why I've ordered the poly mount setup.
I don't see how this would cause a clunking unless it's moving up and down or shifting somehow under braking and acceleration, I've seen stranger things,,,but it's getting replaced anyway.
We'll see if it continues.

In the mean time I guess I'll be scouting one of those mounts. Anyone that has a spare please let me know. Thanks.

GuyO · 06-07-2013, 01:10 AM

Firebird, did you ever find out what caused your clunk? I have something similar going on with the 72 Blazer. I thought when I replaced the differentials with new ring gears, pinions, yokes, new Warn hubs etc. it would go away. Also, I have new brakes (front and back), motor mounts and a newly rebuilt 700r4. But I get a thud sometimes on acceleration after coming to a complete stop. I doubt it is mounts, u-joints, spindles. The only thing left is the NP205 transfer case. Its weird. Any ideas?

12-30-2009, 09:24 PM	#1
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	205 transfer case mounting?? Anyone have pics of the aftermarket poly mount kit for the 205?? I ordered one (still waiting) and I'm a bit confused. As it lists the adapter mount as well as some sort of torque mount. On our blazer all I see is a mount at the transmission/transfer case adapter. I don't see anything resembling any type of torque arm. Could it be missing something?? I do have a driveline "thud" when you come to a stop, and take off again. I'm sure it's related in some way. The original rubber transfer case mount has seen better days.

12-30-2009, 09:44 PM	#2
swyfor5 Registered User Join Date: May 2007 Location: Marion, Mi. Posts: 2,429	Re: 205 transfer case mounting?? Right on, the transmission mounts are the two adapter mounts that bolt to the crossmember. The torsion mount bushings mount the side bracket to the T-case and the frame on the passenger side. I got my poly set from LMC.

12-30-2009, 10:44 PM	#4
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 205 transfer case mounting?? some 205's didn't have the mount. Do you have to large threaded holes on the lower right side of the TC? This is my rockewell tranny but it has the same toque mounts... a clunking sound is more than likely U-joints... Attached Images __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

12-30-2009, 10:46 PM	#5
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 205 transfer case mounting?? here's the mount that bolts to that area.. __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" Last edited by msgross; 12-30-2009 at 10:47 PM.

12-30-2009, 10:55 PM	#6
jaros44sr Registered User Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,423	Re: 205 transfer case mounting?? Should look something like this, but it not assembled in the right order __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim Last edited by jaros44sr; 12-30-2009 at 10:59 PM.

12-31-2009, 04:33 AM	#7
swyfor5 Registered User Join Date: May 2007 Location: Marion, Mi. Posts: 2,429	Re: 205 transfer case mounting?? Yep, that's the mount. From what I can tell some guys run it and some don't. I am going to run it when I swap out my Dana 20 case for my new NP205.

12-31-2009, 04:50 AM	#8
2tons of fun Account Suspended Join Date: Jan 2009 Location: galt ca, Posts: 749	Re: 205 transfer case mounting?? most 205 dont have them. they stopped use them at all in 72/73. you dont need them. but you do need to look at all your ujoints, motor bushings, shock bushings, drive shaft splines, pinion yoke, axle u bolts, there is a ton of stuff that can cause a thud.

12-31-2009, 12:41 PM	#9
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: 205 transfer case mounting?? Ya mines a 72 and evidently didn't come with this mount. Guess I'm going to have some poly bushings from the kit I don't need. I'll crawl under it closer today and look for mounting holes. I would like to add the mount anyway if someone has a spare forsale. Thanks for the pictures too. Thanks for the ideas guys, here's what I know so far. The thud isn't the U-joints. Hard to describe but it does it under braking right before you come to a stop. It doesn't do it getting on and off the gas, you have to hit the brakes and be near a complete stop, then it will thud. Upon acceleration it will thud, but not always in the same spot. Sometimes it will do it as soon as you hit the gas, sometimes halfway through first gear, sometimes it does it on the shift to second gear. Just depends on how aggressive with the throttle you get. Feels more like something is shifting back and forth. Something heavy. Motor mounts are fine, shocks are fine. The entire suspension has all new poly bushings on all the springs, as well as every body to frame mount bushing replaced with poly. Arizona's dry climate is hell on rubber parts U-joints I replaced a few months back, but not for the clunking reason. Basically everything on the truck is poly with one exception. The transmission mount. And it needs replaced, I can pull chunks of rubber off with my fingers. Which is why I've ordered the poly mount setup. I don't see how this would cause a clunking unless it's moving up and down or shifting somehow under braking and acceleration, I've seen stranger things,,,but it's getting replaced anyway. We'll see if it continues. In the mean time I guess I'll be scouting one of those mounts. Anyone that has a spare please let me know. Thanks. Last edited by Firebirdjones; 12-31-2009 at 12:46 PM.

06-07-2013, 01:10 AM	#10
GuyO Registered User Join Date: Nov 2011 Location: Kirkland, WA Posts: 343	Re: 205 transfer case mounting?? Firebird, did you ever find out what caused your clunk? I have something similar going on with the 72 Blazer. I thought when I replaced the differentials with new ring gears, pinions, yokes, new Warn hubs etc. it would go away. Also, I have new brakes (front and back), motor mounts and a newly rebuilt 700r4. But I get a thud sometimes on acceleration after coming to a complete stop. I doubt it is mounts, u-joints, spindles. The only thing left is the NP205 transfer case. Its weird. Any ideas? Attached Images



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