67 shortbed rear end driving me nuts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SchmidtM · 07-07-2024, 02:54 PM

So thanks in advance. I've installed CPP 4,6 DROP. cpp arms. Once I got tranny and motor in the rear seems locked at an angle. I've tried pulling the rear forward and back and can't get it. In pic the green wire is center. The string is running from centered trans. What am I missing.

Joyridin · 07-09-2024, 07:55 AM

What happens when you attach the panhard bar? Can you attach the panhard bar?

SchmidtM · 07-09-2024, 08:31 AM

Quote:

Originally Posted by Joyridin

What happens when you attach the panhard bar? Can you attach the panhard bar?

It pulls it one way or the other but the angle of the driveshaft connect doesn't seem to straighter out. Would the lack of l9ad cause ot?

Joyridin · 07-09-2024, 09:00 AM

I am not understanding what you are saying. If you drop the rear of the truck 4-6", you may need an adjustable panhard bar to hold the rear axle in the correct position. You may also need shims to adjust the driveshaft angle.

**HO455** · 07-09-2024, 10:37 AM

Your post is somewhat confusing but unless you have an adjustable track bar the only thing you need to do is bolt the track bar on and your good to go.

The rear end pinon/yoke will not be centered in the frame if that is your concern. (Very few axles have the pinion in the center of the axle.) Remember as you lower the truck the track bar will push the rear end to the passenger side and as you raise the truck the axle moves to the driver's side. This is more pronounced with the short factory track bar.

If you have an adjustable track bar then you want to center the wheels in the frame at ride height. Checking its alignment at the alignment shop just to be sure the truck is tracking perfectly straight can be done but it's not necessary.

Here is a link to how I aligned mine when I went to an adjustable track bar. Scroll to post 513.

http://67-72chevytrucks.com/vboard/s...698377&page=21

I hope this helps

CC69Rat · 07-09-2024, 06:59 PM

Post a picture of the complete frame, maybe stand on a ladder or something so we can see the overall showing the tail shaft of the transmission, in relation to the rear axle and pinion

Do we know for sure the tail shaft of the transmission is centered on the mount?

Did you replace the trailing arm bushings at the front of the trailing arms where they connect to the cross member? Could one of the bushings (drivers side specifically) be bad and allowed the rear housing to shift forward on that side? Assuming you have trailing arms.. ?

Is it possible the frame is a cut down long bed or anything like that? Have you checked the frame for square?

SchmidtM · 07-11-2024, 06:50 PM

Sorry for the delayed response I may have it but won't know 100% till I get off tomorrow. I will update tomorrow guys thanks

QUOTE=CC69Rat;9326148]Post a picture of the complete frame, maybe stand on a ladder or something so we can see the overall showing the tail shaft of the transmission, in relation to the rear axle and pinion

Do we know for sure the tail shaft of the transmission is centered on the mount?

Did you replace the trailing arm bushings at the front of the trailing arms where they connect to the cross member? Could one of the bushings (drivers side specifically) be bad and allowed the rear housing to shift forward on that side? Assuming you have trailing arms.. ?

Is it possible the frame is a cut down long bed or anything like that? Have you checked the frame for square?[/QUOTE]

07-07-2024, 02:54 PM	#1
SchmidtM Registered User Join Date: Mar 2022 Location: CHESTERFIELD Posts: 29	67 shortbed rear end driving me nuts So thanks in advance. I've installed CPP 4,6 DROP. cpp arms. Once I got tranny and motor in the rear seems locked at an angle. I've tried pulling the rear forward and back and can't get it. In pic the green wire is center. The string is running from centered trans. What am I missing. Attached Images

07-09-2024, 07:55 AM	#2
Joyridin Registered User Join Date: Sep 2020 Location: Cleveland, Ohio Posts: 545	Re: 67 shortbed rear end driving me nuts What happens when you attach the panhard bar? Can you attach the panhard bar?

07-09-2024, 09:00 AM	#4
Joyridin Registered User Join Date: Sep 2020 Location: Cleveland, Ohio Posts: 545	Re: 67 shortbed rear end driving me nuts I am not understanding what you are saying. If you drop the rear of the truck 4-6", you may need an adjustable panhard bar to hold the rear axle in the correct position. You may also need shims to adjust the driveshaft angle.

07-09-2024, 10:37 AM	#5
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,300	Re: 67 shortbed rear end driving me nuts Your post is somewhat confusing but unless you have an adjustable track bar the only thing you need to do is bolt the track bar on and your good to go. The rear end pinon/yoke will not be centered in the frame if that is your concern. (Very few axles have the pinion in the center of the axle.) Remember as you lower the truck the track bar will push the rear end to the passenger side and as you raise the truck the axle moves to the driver's side. This is more pronounced with the short factory track bar. If you have an adjustable track bar then you want to center the wheels in the frame at ride height. Checking its alignment at the alignment shop just to be sure the truck is tracking perfectly straight can be done but it's not necessary. Here is a link to how I aligned mine when I went to an adjustable track bar. Scroll to post 513. http://67-72chevytrucks.com/vboard/s...698377&page=21 I hope this helps __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

07-09-2024, 06:59 PM	#6
CC69Rat Registered User Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,212	Re: 67 shortbed rear end driving me nuts Post a picture of the complete frame, maybe stand on a ladder or something so we can see the overall showing the tail shaft of the transmission, in relation to the rear axle and pinion Do we know for sure the tail shaft of the transmission is centered on the mount? Did you replace the trailing arm bushings at the front of the trailing arms where they connect to the cross member? Could one of the bushings (drivers side specifically) be bad and allowed the rear housing to shift forward on that side? Assuming you have trailing arms.. ? Is it possible the frame is a cut down long bed or anything like that? Have you checked the frame for square? __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

07-11-2024, 06:50 PM	#7
SchmidtM Registered User Join Date: Mar 2022 Location: CHESTERFIELD Posts: 29	Re: 67 shortbed rear end driving me nuts Sorry for the delayed response I may have it but won't know 100% till I get off tomorrow. I will update tomorrow guys thanks QUOTE=CC69Rat;9326148]Post a picture of the complete frame, maybe stand on a ladder or something so we can see the overall showing the tail shaft of the transmission, in relation to the rear axle and pinion Do we know for sure the tail shaft of the transmission is centered on the mount? Did you replace the trailing arm bushings at the front of the trailing arms where they connect to the cross member? Could one of the bushings (drivers side specifically) be bad and allowed the rear housing to shift forward on that side? Assuming you have trailing arms.. ? Is it possible the frame is a cut down long bed or anything like that? Have you checked the frame for square?[/QUOTE]



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