The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 01-17-2020, 07:48 PM   #1
RCon
Registered User
 
Join Date: Jul 2017
Location: East Islip
Posts: 1
Transmission swap question

I have a 72 C20 pickup with a th350. I want to change it to a 700r4 and want to know if anyone knows where i can get the new crossmember for it.
RCon is offline   Reply With Quote
Old 01-17-2020, 09:30 PM   #2
71meangreenc10
Its a Truck Thing......
 
71meangreenc10's Avatar
 
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 2,894
Re: Transmission swap question

https://www.partsgeek.com/chpjx2r-ch...on+Crossmember

Worked for me.

Smitty
__________________
71 C10 283/3SPD Full Resto
71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599
70 Suburban Former military GSA truck.
72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber...Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378
72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one.....Gen 5 5.3/6L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110
68 Suburban was 3/4 ton, now 1/2....Wife shook her head...
71 C30 Wrecker....Cooter never had it this good...Wife actually smiled...
72 C20 Blue Beard....Its a Builder
71 C20 Scott-Bilt As weird as it gets..BB AC Truck
71meangreenc10 is offline   Reply With Quote
Old 01-18-2020, 11:27 AM   #3
Andy4639
Orignal Goof member
 
Andy4639's Avatar
 
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 18,354
Thumbs up Re: Transmission swap question

No need for a new crossmember it will work fine on your 350 but you will need the rubber mount for it. That it. I just did a 700-R4 in my 68. Slide the crossmember back and drilled 2 holes.
Attached Images
   
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour


http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
Andy4639 is online now   Reply With Quote
Old 01-18-2020, 11:34 AM   #4
71meangreenc10
Its a Truck Thing......
 
71meangreenc10's Avatar
 
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 2,894
Re: Transmission swap question

Andy,

Post a pic of how it looks to access the rear pan bolts with a stock crossmember.

Smitty
__________________
71 C10 283/3SPD Full Resto
71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599
70 Suburban Former military GSA truck.
72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber...Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378
72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one.....Gen 5 5.3/6L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110
68 Suburban was 3/4 ton, now 1/2....Wife shook her head...
71 C30 Wrecker....Cooter never had it this good...Wife actually smiled...
72 C20 Blue Beard....Its a Builder
71 C20 Scott-Bilt As weird as it gets..BB AC Truck
71meangreenc10 is offline   Reply With Quote
Old 01-18-2020, 10:36 PM   #5
Andy4639
Orignal Goof member
 
Andy4639's Avatar
 
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 18,354
Talking Re: Transmission swap question

I will try and remember to do this tomorrow. From what I remember it's very tight but doable. I used this same setup on the 71 C 10 when I did the 700-R4 in it.
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour


http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
Andy4639 is online now   Reply With Quote
Old 01-20-2020, 09:22 AM   #6
Smitty
Senior Member
 
Smitty's Avatar
 
Join Date: Dec 1999
Location: Spring Valley, Ca.
Posts: 799
Re: Transmission swap question

When I dis mine I trimmed the small horizontal flange on the front of the crossmember. Then added a plate inside the vertical to strengthen it. Gives needed space for access to rear pan bolts. Although the gusset probably wasn’t necessary. 15+ yrs. no issues.
__________________
Smitty
'71 Short Fleetside
Spring Valley, Ca.
Smitty is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:48 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com