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-   -   Tranny / tcase problem (https://67-72chevytrucks.com/vboard/showthread.php?t=491001)

jjzepplin 11-23-2012 08:07 AM

Re: Tranny / tcase problem
 
I ran without that bracket for over ten years beating the he!! out of my drive train with 36" Swampers. I did snap my adapter during a head on 55 mph accident though. When I went to replace it I spoke to a shop that rebuilds t-cases and that's it. They told me the one I had was a weak version. It had a support bearing. They said to get the one without that bearing as the casting was much stronger. I have two now just in case. I have that strut but cannot use it as I have a crawl box. If any one wants it for shipping costs it's free! I will recycle my t-case frame brackets...;)

argonaut 11-24-2012 01:15 PM

Re: Tranny / tcase problem
 
I'll take you up on the strut.

DirtyLarry 11-24-2012 05:53 PM

Re: Tranny / tcase problem
 
Quote:

Originally Posted by lowrollin70gmc (Post 5591692)
I'm dragging this back up for another question on NP205 support. Looking for Larry's advice on the matter, knowing his level of experience.

I clocked the 205 behind my Cummins/NV5600 flat with a Trail Tech Fab adapter. At the same time I ordered their NP205 support kit. It attaches to the rear of the case, opposite the front driveline and features a poly bushing. Any opinions on this means of support? It is closer to the center than a stock frame mount and does have a bushing.

I haven't welded up the support kit, so opinions are welcome.

Somehow I missed this one back in September. That looks like a nice set up there for hardcore use! As long as the tcase is allowed to rotate with the transmission/engine assembly instead of being tied to the frame, that would work great. Nothing wrong with added beef to connect the tcase to the transmission.

72BBCK20 12-04-2012 01:57 PM

Re: Tranny / tcase problem
 
This is an interesting topic, I am currently in the final steps of a 72 K20 build with car 427BBC/NV4500/6 bolt round pattern NP205. the powertrain is mounted to an 86 K30 motor and transmission crossmembers with 86 motor and trans mounts. I also installed the tcase to frame bracket. Should I remove the side T/C mount without adding anything else in place? Is this not to much cantilever weight for the NV4500 aluminum tailhousing? NOW is the time to do something before she's back on the road.

CrewCab59 12-04-2012 03:09 PM

Re: Tranny / tcase problem
 
With the 4spd long adapter they tend to be weak to start with.

Those builder t-case supports do more damage than without and mixing poly and rubber.

Alex V. 03-13-2014 12:17 PM

Re: Tranny / tcase problem
 
Quote:

Originally Posted by argonaut (Post 5717844)
This thread is an interesting read. It is true that the T/C torque mount would be the cause of adapter and bellhousing failures.

I do see that some on here have said they weren't used on 73 and up trucks. I'm wondering about the validity of that statement only because my 73 K20 had the mount. Not to say that someone didn't add it on later, thinking it was necessary. I'm wondering when GM truly did stop using them.

Also, does anyone have a picture of what the alternative torque rod looks like? I've never seen this before.

I have a '74 K10 at the moment that had the T-case side brace. The rear diff. and driveshaft have been replaced, and the trans./T-case mount has been broke clean off and welded back together - being a factory 454 truck, it's easier to figure how this happened than if it had been a 6 cyl. truck all its life, as it is now. I can't say with 100% certainty that the truck came from the factory with the T-case brace, but it sure doesn't look like it was added on. However, the evidence presented here suggesting the driveline is under less stress when the brace isn't there makes sense to me so I'm going to leave it off.

FWIW, originally the truck was a 454/auto (currently has a TH350, not sure if it's original or not) with an NP205 and a few HD suspension options - shocks and front springs, IIRC.

72BBCK20 03-25-2014 12:20 PM

Re: Tranny / tcase problem
 
What about making some sort of "pinion snubber" type of bumper on the skid plate just to support the overhanging weight of the 205 on that aluminum nv4500 tail housing?

gmc 2500 4x4 07-05-2014 10:20 AM

Re: Tranny / tcase problem
 
glad i found this thread, i just bought new bushing kit for the t/c bracket on my '69 k20 now im thinkin bout leaving it off>>>>thanx 4 this info

MIKE77z 05-12-2016 11:52 AM

Re: Tranny / tcase problem
 
Again old threads save patts. Looking around for thr new bushing stumbled me on to this thread . Bracket is stay in the boxes ramjet 350 700r4 205 in a 69 blazer .

El Dorado Jim 05-13-2016 01:59 AM

Re: Tranny / tcase problem
 
great info. thanks for bringing up this old thread, I think my son's truck has the brace on it, It will be removed tomorrow!

mattfrediani 03-14-2017 10:18 PM

Re: Tranny / tcase problem
 
So I have a TH350 with the 205 case and the side bracket is there and rubber is worn out on side mount. I replaced the transmission with a new TH350, installed new energy suspension mounts to the crossmember and put the side bracket back. should I remove the side bracket? can the adapter plate hold the transfer case? Really? remove the side bracket or get new rubber for it? my 4x4 is mainly a street wheeler and never got off road

thanks guys

Matt

1968vetL-71 03-17-2017 07:29 AM

Re: Tranny / tcase problem
 
I think this thread already answers your question. Ditch it! The transfer case will be just fine by the adapter itself. I always removed the side brackets when present. Cracked a few adapters in my time, I was hard on them tho. There will always be the argument of "yay or nay", just like Ford vs Chevy.... Well not on this site its NOT!!! :lol:

87Skier 04-17-2017 02:26 AM

Re: Tranny / tcase problem
 
Just thought I would add this in here... my brother has a 79 bronco with a 205. It's driver side drop. It has a side mount. Not too much different than the ones we have on our trucks.

Redcap 04-17-2017 02:54 AM

Re: Tranny / tcase problem
 
Quote:

Originally Posted by 87Skier (Post 7917899)
Just thought I would add this in here... my brother has a 79 bronco with a 205. It's driver side drop. It has a side mount. Not too much different than the ones we have on our trucks.

Fords bust transfer case adapters too.

mattfrediani 04-17-2017 09:26 AM

Re: Tranny / tcase problem
 
How can you tell if your transfer case adapter is cracked? I can't see one but when I come to a stop a hear and feel a clunk under my floor.

kwmech 04-17-2017 11:14 AM

Re: Tranny / tcase problem
 
Quote:

Originally Posted by mattfrediani (Post 7918003)
How can you tell if your transfer case adapter is cracked? I can't see one but when I come to a stop a hear and feel a clunk under my floor.

If yours was cracked, you'd be dumping oil on the ground. With 150 lbs hanging there, once it cracks it's falling off

'63GENIII 04-17-2017 10:12 PM

Re: Tranny / tcase problem
 
Quote:

Originally Posted by kwmech (Post 7918086)
If yours was cracked, you'd be dumping oil on the ground. With 150 lbs hanging there, once it cracks it's falling off

The thought of driving around and having that happen gives me chills. Another reason to like my divorced case.

El Dorado Jim 04-17-2017 11:36 PM

Re: Tranny / tcase problem
 
Quote:

Originally Posted by 87Skier (Post 7917899)
Just thought I would add this in here... my brother has a 79 bronco with a 205. It's driver side drop. It has a side mount. Not too much different than the ones we have on our trucks.

get rid of the side mount....

Dirt_Diver_Jr 12-24-2017 01:48 PM

Re: Tranny / tcase problem
 
DirtyLarry,
I am new to this forum and also to trucks predating the 2000s. I also realize this post is ten years old at this point butttt... I have recently redone my drivetrain. 69 Chevy with a 350, SM465, NP205. Im putting it all back in now and wanted to replace the rubber in the mount on the side of the Tcase-Frame. I have now read through multiple threads on here arguing wether to use this or not. I hear your argument to not use the mount but I see in your photo that you have a crossmember that runs under both your trans and your tcase. I only have a crossmember under the trans. This means that if I don't use the frame mount with my Tcase the only thing holding my 205 in there would be the 8 bolts to the spacer. Is it okay to have the Tcase hanging there in space by only the eight bolts? Suggestions? Thanks!

'63GENIII 12-24-2017 05:53 PM

Re: Tranny / tcase problem
 
IIRC, there is also a rod (for lack of a better description) that attaches to the side of the T Case and ties into the back of the block at one of the bell housing bolts. This should give some support to the T case while allowing the engine, transmission and transfer case to move as one which takes the stress off of the bell housing and the trans to T case adapter.

FWIW, I run a divorced 205 and have not had to deal with the issues that you are asking about but have read much of the arguments for and against the side mount. If I were to run a married set up as you are, I'd run the rod support and ditch the side mount. Just my .02$.

Richard2112 12-24-2017 07:11 PM

Re: Tranny / tcase problem
 
I don't even have 4wd and yet learned something new from reading this thread. I was going to attach a second cross member to my NV4500 and folks said not to. So, I didn't. Now I see why.

mud.man.rj 12-25-2017 02:52 PM

Re: Tranny / tcase problem
 
Do the 205's run the rod, thought it was only the 203 cast or the 208, 205 has the side mount, I would run the mount if it came w it or make the rod work as mentioned, less stress on it for sure especially if the tire size is increased over stock or abused like I do, I call it driving it, haha.
Mudman.

El Dorado Jim 12-26-2017 03:06 PM

Re: Tranny / tcase problem
 
Quote:

Originally Posted by Dirt_Diver_Jr (Post 8112969)
DirtyLarry,
I am new to this forum and also to trucks predating the 2000s. I also realize this post is ten years old at this point butttt... I have recently redone my drivetrain. 69 Chevy with a 350, SM465, NP205. Im putting it all back in now and wanted to replace the rubber in the mount on the side of the Tcase-Frame. I have now read through multiple threads on here arguing wether to use this or not. I hear your argument to not use the mount but I see in your photo that you have a crossmember that runs under both your trans and your tcase. I only have a crossmember under the trans. This means that if I don't use the frame mount with my Tcase the only thing holding my 205 in there would be the 8 bolts to the spacer. Is it okay to have the Tcase hanging there in space by only the eight bolts? Suggestions? Thanks!

Yes you will be fine just using the crossmember with the adapter bolted to it,that is the way they came from about 1973 on up, no side mount

Aggie-01 02-03-2021 10:23 PM

Re: Tranny / tcase problem
 
I know this is an old thread but I have a 1973 Jimmy with a NP203. It is leaking from the rear bolt on the torque bracket that is being discussed. Is there a seal behind the bolts? Also I know the main discussion was on the NP205 but would it be appropriate to remove the torque bracket on mine as well?

Redcap 02-03-2021 10:34 PM

Re: Tranny / tcase problem
 
Quote:

Originally Posted by Aggie-01 (Post 8874579)
I know this is an old thread but I have a 1973 Jimmy with a NP203. It is leaking from the rear bolt on the torque bracket that is being discussed. Is there a seal behind the bolts? Also I know the main discussion was on the NP205 but would it be appropriate to remove the torque bracket on mine as well?

Nope. Pull the bolt and seal the threads. Or remove the bracket entirely.


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