Transfer case question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Johnl48** · 12-18-2021, 10:43 AM

I purchased a case on ebay to replace my cracked one. Everything seems the same except there are no mounting holes for mounting bolts..what am I missing here ?

LONGHAIR · 12-18-2021, 06:22 PM

That's not really a "mounting point". A support brace goes from there, up the side of the engine block and across the starter. Most of them get removed during the first starter replacement and never reinstalled.

That's not right? I'm thinking about the ones from the cover over the flex-plate/torque convertor, going across the starter.

57taskforce · 12-18-2021, 07:54 PM

Those holes have a bracket that bolts to them and the frame with bushings. That bracket can be a heated topic amongst 205 lovers. Some associate the bracket to causing cracked transmission/transfer case adaptors and pitch them asap. Others swear they would never run without them because it’ll crack the adaptor… I’ve run them and not run them and never broke an adaptor… go figure. Point being those holes aren’t necessary if you don’t mind not running the bracket.

**Louisvillekytruck** · 12-18-2021, 08:16 PM

Quote:

Originally Posted by Johnl48

I purchased a case on ebay to replace my cracked one. Everything seems the same except there are no mounting holes for mounting bolts..what am I missing here ?

Maybe it's a later model that did not use the side bracket

**Johnl48** · 12-18-2021, 08:24 PM

Quote:

Originally Posted by 57taskforce

Those holes have a bracket that bolts to them and the frame with bushings. That bracket can be a heated topic amongst 205 lovers. Some associate the bracket to causing cracked transmission/transfer case adaptors and pitch them asap. Others swear they would never run without them because it’ll crack the adaptor… I’ve run them and not run them and never broke an adaptor… go figure. Point being those holes aren’t necessary if you don’t mind not running the bracket.

So there is enough support with it just bolted to adapter ?

**Louisvillekytruck** · 12-18-2021, 08:26 PM

Yes alot of people say do not put the bracket on

**Johnl48** · 12-18-2021, 08:27 PM

Quote:

Originally Posted by Louisvillekytruck

Yes alot of people say do not put the bracket on

Thank you

57taskforce · 12-18-2021, 11:29 PM

My current K20 does not run the mount, its still plenty stout.

BLAZERMAN · 12-21-2021, 04:00 AM

If you do end up using the side support I suggest you use the OEM rubber bushings and not the aftermarket poly bushings.

sweetk30 · 12-21-2021, 12:26 PM

What did you pay for the case ? Small or large input bearing ?

I got a bunch of parts and cases to clean out .

As said brace rod holes or older got frame brace but they tend to brake adapter or tail on trans . If you need them just drill & tap them .

**Zoomad75** · 12-21-2021, 12:31 PM

Not worth going through the effort to drill the holes out for the side mount. People can debate it but there's a reason GM stopped using the mount.

**Johnl48** · 12-21-2021, 12:32 PM

Quote:

Originally Posted by Zoomad75

Not worth going through the effort to drill the holes out for the side mount. People can debate it but there's a reason GM stopped using the mount.

What about the rod support to bell housing ? Needed ?

**Zoomad75** · 12-21-2021, 12:39 PM

Quote:

Originally Posted by Johnl48

What about the rod support to bell housing ? Needed ?

Again, for the effort it would take to drill out the housing I don't think it's worth it. A large amount of squarebody trucks never got that strut rod.

**kwmech** · 12-21-2021, 12:41 PM

I always put the support rod back. GM continued the use of the bell housing rod up through 91 on the Blazers and Suburbans with the 208 and 241 t-cases. When I converted my suburban to a 4l80e I had to lengthen the rod for the longer transmission. It was the 205 ?square mount? that got the bad rap with breaking the adapter or the trans case, not the bell housing rod

BLAZERMAN · 12-21-2021, 03:55 PM

Quote:

Originally Posted by kwmech

I always put the support rod back. GM continued the use of the bell housing rod up through 91 on the Blazers and Suburbans with the 208 and 241 t-cases. When I converted my suburban to a 4l80e I had to lengthen the rod for the longer transmission. It was the 205 ?square mount? that got the bad rap with breaking the adapter or the trans case, not the bell housing rod

In my.opinion that strut rod brace does a lot more good than the support bracket does., especially on a lifted truck.

**Johnl48** · 12-21-2021, 09:45 PM

57taskforce · 12-22-2021, 12:17 AM

Quote:

Originally Posted by Johnl48

Hell yea man that looks awesome.

Quote:

Originally Posted by BLAZERMAN

In my.opinion that strut rod brace does a lot more good than the support bracket does., especially on a lifted truck.

I agree completely.

sweetk30 · 12-22-2021, 09:11 PM

looking good there . .

12-18-2021, 10:43 AM	#1
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 324	Transfer case question I purchased a case on ebay to replace my cracked one. Everything seems the same except there are no mounting holes for mounting bolts..what am I missing here ?

12-18-2021, 07:54 PM	#3
57taskforce All about them K’s Join Date: Jun 2014 Location: Farmington, New Mexico Posts: 6,231	Re: Transfer case question Those holes have a bracket that bolts to them and the frame with bushings. That bracket can be a heated topic amongst 205 lovers. Some associate the bracket to causing cracked transmission/transfer case adaptors and pitch them asap. Others swear they would never run without them because it’ll crack the adaptor… I’ve run them and not run them and never broke an adaptor… go figure. Point being those holes aren’t necessary if you don’t mind not running the bracket. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0

12-18-2021, 08:26 PM	#6
Louisvillekytruck Senior Member Join Date: Jun 2019 Location: Louisville ky Posts: 1,206	Re: Transfer case question Yes alot of people say do not put the bracket on

12-18-2021, 11:29 PM	#8
57taskforce All about them K’s Join Date: Jun 2014 Location: Farmington, New Mexico Posts: 6,231	Re: Transfer case question My current K20 does not run the mount, its still plenty stout. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0

12-21-2021, 04:00 AM	#9
BLAZERMAN Currently Blazerless Join Date: Apr 2000 Location: St. Joseph Mo. Posts: 4,826	Re: Transfer case question If you do end up using the side support I suggest you use the OEM rubber bushings and not the aftermarket poly bushings. __________________ 1972 C/30 133" W.B. C&C 1970 GMC 3500 157" W.B. single wheel C&C

12-21-2021, 12:26 PM	#10
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Transfer case question What did you pay for the case ? Small or large input bearing ? I got a bunch of parts and cases to clean out . As said brace rod holes or older got frame brace but they tend to brake adapter or tail on trans . If you need them just drill & tap them . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

12-21-2021, 12:31 PM	#11
Zoomad75 K5Camper Join Date: Mar 2004 Location: Pueblo, CO Posts: 1,513	Re: Transfer case question Not worth going through the effort to drill the holes out for the side mount. People can debate it but there's a reason GM stopped using the mount. __________________ Rob Z. 1975 K5 350/465/205/D44/12b 4" lift on 35's- RIP 1991 K5 8.1L/NV4500/241/D44/14b FWC Camper

12-21-2021, 12:41 PM	#14
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,389	Re: Transfer case question I always put the support rod back. GM continued the use of the bell housing rod up through 91 on the Blazers and Suburbans with the 208 and 241 t-cases. When I converted my suburban to a 4l80e I had to lengthen the rod for the longer transmission. It was the 205 ?square mount? that got the bad rap with breaking the adapter or the trans case, not the bell housing rod

12-21-2021, 09:45 PM	#16
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 324	Re: Transfer case question

12-22-2021, 09:11 PM	#18
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Transfer case question looking good there . . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.



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