Cab and box dont line up. Why ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72MARIO · 03-29-2004, 10:06 AM

I am looking at buying a 84 3/4 ton. The box sit's lower than the back wall of the cab about 1". The rear frameon the cab ia not rotted. The body mount is only 1" thick should it be thicker ? or could the frame be bent ?

Thanks for the help.

8t5Silverado · 03-29-2004, 03:19 PM

I have a similar problem, but don't know what the problem is.

Not trying to jack your thread, but nobody seems to be replying.

The front of my bed sits noticeably lower on the passenger side, yet the passenger side has a larger gap between the tire and fender lip.

Anybody know?

How do you check if a frame is bent? I assume you could measure diagonally from similar points on each side...

bigblock73 · 03-29-2004, 03:30 PM

Can you get a quick pic of it?

Was the truck sitting on level ground when you noticed this?

I think the cushion between the cab and frame mount should be thicker than 1"...are they BOTH 1" thick?

72MARIO · 03-29-2004, 04:09 PM

I figured My problem out. The cab mounts are 1/2 ton truck. And are 1 " thick The 3/4 ton truck has doubble thick mounts. About 2 1/2 inches. That's Whay the back of the cab sits lower.

Have you checked your cab mounts ? I bet they are rotted and one is sagging.,

MArio

8t5Silverado · 03-29-2004, 08:13 PM

I might have a rotted cab mount, but that alone wouldn't make the rear fender lip sit closer to the tire.

I am perplexed because my driver side sits lower than the driver side at the bed,

but the passenger side fender sits lower than the driver side.

front of bed = low on pass. side

wheelwell on bed = low on driver side

*1FaastC10* · 03-29-2004, 10:15 PM

Quote:

Originally posted by 72MARIO
I figured My problem out. The cab mounts are 1/2 ton truck. And are 1 " thick The 3/4 ton truck has doubble thick mounts. About 2 1/2 inches. That's Whay the back of the cab sits lower.

1/2 and 3/4 ton frames are the same dimensions.

72MARIO · 03-30-2004, 11:40 AM

Wierd.

Why are there 2 diffirent thickness of Cab Mount's ?

Lester · 03-30-2004, 02:05 PM

From 73 to 80 there were TWO different cabs, 2wd and 4wd. GM used different cab mounts to set the ride height for these cabs the same.

From 81 to 87 there is only ONE cab for both 2wd and 4wd.

When the frames and cabs get mixed due to repairs the cab issue is often over looked resulting in the cab sitting too low or too high. Sounds like this might be what happened to this truck.

Since the cabs are easy to identify once you know they are different buying the mounts for the frame for the cab you are using in most cases should fix the problem.

The 81 to 87 cab for 2wd and 4wd is almost exactly the same as the 73 to 80 2wd cab.

Using the older 4wd cab on a newer frame usually requires installing a 2" cab lift to fix the ride height. At least the one time I ran into this problem this fixed it.

Good luck.

8t5Silverado · 03-31-2004, 03:58 PM

ttt

gldevall · 03-31-2004, 04:32 PM

You could run a carfax on it to see if that would bring up any wrecks.

screwballl · 03-31-2004, 05:10 PM

I tried running carfax on my truck but then i saw the small print: vehicles must be made 1981 or later oh well lol

8t5Silverado · 04-01-2004, 02:08 PM

I did and it only showed a small wreck in the front, which is apparent with the fender and bumper damage that I have.

03-29-2004, 10:06 AM	#1
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Cab and box dont line up. Why ? I am looking at buying a 84 3/4 ton. The box sit's lower than the back wall of the cab about 1". The rear frameon the cab ia not rotted. The body mount is only 1" thick should it be thicker ? or could the frame be bent ? Thanks for the help. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

03-29-2004, 03:19 PM	#2
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	I have a similar problem, but don't know what the problem is. Not trying to jack your thread, but nobody seems to be replying. The front of my bed sits noticeably lower on the passenger side, yet the passenger side has a larger gap between the tire and fender lip. Anybody know? How do you check if a frame is bent? I assume you could measure diagonally from similar points on each side... __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

03-29-2004, 03:30 PM	#3
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	Can you get a quick pic of it? Was the truck sitting on level ground when you noticed this? I think the cushion between the cab and frame mount should be thicker than 1"...are they BOTH 1" thick? __________________ Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale

03-29-2004, 04:09 PM	#4
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	I figured My problem out. The cab mounts are 1/2 ton truck. And are 1 " thick The 3/4 ton truck has doubble thick mounts. About 2 1/2 inches. That's Whay the back of the cab sits lower. Have you checked your cab mounts ? I bet they are rotted and one is sagging., MArio __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

03-29-2004, 08:13 PM	#5
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	I might have a rotted cab mount, but that alone wouldn't make the rear fender lip sit closer to the tire. I am perplexed because my driver side sits lower than the driver side at the bed, but the passenger side fender sits lower than the driver side. front of bed = low on pass. side wheelwell on bed = low on driver side __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

03-30-2004, 11:40 AM	#7
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Wierd. Why are there 2 diffirent thickness of Cab Mount's ? __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

03-30-2004, 02:05 PM	#8
Lester Registered User Join Date: Oct 2002 Posts: 84	From 73 to 80 there were TWO different cabs, 2wd and 4wd. GM used different cab mounts to set the ride height for these cabs the same. From 81 to 87 there is only ONE cab for both 2wd and 4wd. When the frames and cabs get mixed due to repairs the cab issue is often over looked resulting in the cab sitting too low or too high. Sounds like this might be what happened to this truck. Since the cabs are easy to identify once you know they are different buying the mounts for the frame for the cab you are using in most cases should fix the problem. The 81 to 87 cab for 2wd and 4wd is almost exactly the same as the 73 to 80 2wd cab. Using the older 4wd cab on a newer frame usually requires installing a 2" cab lift to fix the ride height. At least the one time I ran into this problem this fixed it. Good luck.

03-31-2004, 03:58 PM	#9
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	ttt __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

03-31-2004, 04:32 PM	#10
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	You could run a carfax on it to see if that would bring up any wrecks. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels

03-31-2004, 05:10 PM	#11
screwballl Tonawanda 454 Join Date: Mar 2004 Location: Liquid Sunshine State Posts: 2,754	I tried running carfax on my truck but then i saw the small print: vehicles must be made 1981 or later oh well lol __________________ 91 Chevy Suburban Tonawanda 454 R2500 - SOLD!!! 04 Dodge Durango 5.7L Hemi 2WD, 24K miles (as of July 2011) In the past 30 years about 90% of Fords are still on the road, the other 10% made it home. -------------------

04-01-2004, 02:08 PM	#12
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	I did and it only showed a small wreck in the front, which is apparent with the fender and bumper damage that I have. __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

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