trans mount - The 1947 - Present Chevrolet & GMC Truck Message Board Network

threeonthetree · 06-17-2012, 11:57 AM

Have the double hump mount for my trans its from a 1985 chevy shortbox

my trans is a 4 speed with the granny gear.

holes do not line up on 73 k5 frame

what is the right trans mount for the frame?

should i mount above or below the frame. have a 4 inch lift.

russgt · 06-17-2012, 02:10 PM

I believe that the 73 should have the flat crossmember and the double hump is for the aluminum transfer case applications? Anyways, here is the mount in my 76' 4 speed/205.

threeonthetree · 06-17-2012, 06:02 PM

Thanks for you reply so can i use the flat style trans mount with my newer transfer, trans.

i have some pics to show you wat im workin with.

also a bolt broke off in the case.

threeonthetree · 06-18-2012, 09:48 PM

Can i use the double hump one on my older frame.

rcbildr · 06-19-2012, 12:45 AM

I think you can use it on the older frame. One thing I noticed with the double hump vs. flat x-member is height/clearance. When I converted my burb to a manual I had to swap out the x-member. It originally had the double hump, but the t-case adapter was different so I had to find the flat crossmember because the t-case woulde've hit the floor. It looks like you have the "short" t-case adapter so the double hump crossmember will be needed. Probably the best thing to do would be to measure the width of your frame and compare it to the width of the crossmember.

threeonthetree · 06-19-2012, 09:13 AM

Would you recommend lowering my trans mount because of the 4" lift?

obijuan · 06-19-2012, 09:22 AM

no dont lower your drivetrain like that. use the correct adapter and crossmember. drill out that bolt broken off and drill new holes in the frame to bolt the W crossmember.

there is a 465/208 adapter that uses the flat crossmember. the short adapters you have started in 85. find an older adapter o use the flat crossmember.

and it goes below the rails. one tons with the 8" thick frame get mounted inside the rails.

rcbildr · 06-19-2012, 09:28 PM

Quote:

Originally Posted by threeonthetree

Would you recommend lowering my trans mount because of the 4" lift?

IMO I wouldn't. I've seen others do it to help with the rear drive shaft angle, but it totally messes up the front drive shaft/cv joint angle on the t-case. I've got a 4" lift on my 85 suburban and I didn't have to lower the t-case.

06-17-2012, 11:57 AM	#1
threeonthetree Registered User Join Date: Feb 2009 Location: Wausau, WI Posts: 975	trans mount Have the double hump mount for my trans its from a 1985 chevy shortbox my trans is a 4 speed with the granny gear. holes do not line up on 73 k5 frame what is the right trans mount for the frame? should i mount above or below the frame. have a 4 inch lift. __________________ Smoking Tires Since 1992 1969 c10 AKA SIN 1985 SSWB TRAZER (super short wheel base)

06-17-2012, 02:10 PM	#2
russgt Registered User Join Date: May 2008 Location: Waukesha, WI Posts: 904	Re: trans mount I believe that the 73 should have the flat crossmember and the double hump is for the aluminum transfer case applications? Anyways, here is the mount in my 76' 4 speed/205. __________________ 70 stepside 76 blazer 86 Silverado 20 Max Trailering 6.2 Crew 71 Nova SS My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=363634

06-17-2012, 06:02 PM	#3
threeonthetree Registered User Join Date: Feb 2009 Location: Wausau, WI Posts: 975	Re: trans mount Thanks for you reply so can i use the flat style trans mount with my newer transfer, trans. i have some pics to show you wat im workin with. also a bolt broke off in the case. __________________ Smoking Tires Since 1992 1969 c10 AKA SIN 1985 SSWB TRAZER (super short wheel base)

06-18-2012, 09:48 PM	#4
threeonthetree Registered User Join Date: Feb 2009 Location: Wausau, WI Posts: 975	Re: trans mount Can i use the double hump one on my older frame. __________________ Smoking Tires Since 1992 1969 c10 AKA SIN 1985 SSWB TRAZER (super short wheel base)

06-19-2012, 12:45 AM	#5
rcbildr Registered User Join Date: Sep 2000 Location: Gold Bar, WA Posts: 1,216	Re: trans mount I think you can use it on the older frame. One thing I noticed with the double hump vs. flat x-member is height/clearance. When I converted my burb to a manual I had to swap out the x-member. It originally had the double hump, but the t-case adapter was different so I had to find the flat crossmember because the t-case woulde've hit the floor. It looks like you have the "short" t-case adapter so the double hump crossmember will be needed. Probably the best thing to do would be to measure the width of your frame and compare it to the width of the crossmember. __________________ My Projects: 1960 GMC 1/2ton with 305 V6 (daily driver) 1963 Chevy 1/2ton 2wd...converting to 4x4 1967 Suburban 1/2ton 2wd My Girlfriends Projects 1985 Chevy Suburban 3/4ton 4x4 with 6.2L diesel, 4" lift, converted to TH-400, Warn Premium manual hubs, & Wildcat 315/75/R16 tires. (daily driver) 1978 Camaro Type LT with a Marine 350 & vortec heads, Rochester Carb, & roller cam 1978 Camaro Z28

06-19-2012, 09:13 AM	#6
threeonthetree Registered User Join Date: Feb 2009 Location: Wausau, WI Posts: 975	Re: trans mount Would you recommend lowering my trans mount because of the 4" lift? __________________ Smoking Tires Since 1992 1969 c10 AKA SIN 1985 SSWB TRAZER (super short wheel base)

06-19-2012, 09:22 AM	#7
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	Re: trans mount no dont lower your drivetrain like that. use the correct adapter and crossmember. drill out that bolt broken off and drill new holes in the frame to bolt the W crossmember. there is a 465/208 adapter that uses the flat crossmember. the short adapters you have started in 85. find an older adapter o use the flat crossmember. and it goes below the rails. one tons with the 8" thick frame get mounted inside the rails.



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