help…box/cab hitting on a 71 gmc
Question:
>i would also sugest that if you do not know the history of the truck ! >then have the frame checked,also get someone to drive behind you see if it >is dog tracking at all ! i had a simaler prob and found it was my frame,
Good point. If for some reason the frame has a diamond (not square), this could also cause the bed and cab shift with respect to each other. Note that with the usual toe-in, your front tires may appear to have slightly wider track than the rear. Look on both sides of the vehicle and see if the front tires are exposed by the same amount. This experiment also requires you to be driving on level ground so the steering will is not cocked to one side to keep the truck going straight. In general, dog-tracking is noticeable if you have to continue fighting the steering going down the road. If the ass end keeps going to one side, you’ll continually have to make steering corrections. -Clint — Clint Olsen . — . .’ ,-. `. ;_,’ ( ; `. “;’ ` — ‘
Response:
I was hoping that someone might be able to shed a little light on my subject. I have a 1971 GMC p/u and since it was painted last august i was hearing a weird noise when i went over a couple of bumps. It always happened on two particular bumps and when i was washing my truck the other day i noticed that the bolts on the front part of the box on the passenger’s side were taking a chunk out of my cab. the guy took it apart today and told me he can’t see why it is doing that. his only idea is the cab mounts, but he says they look ok. when i first took it back, we noticed that the box was a lot closer to the cab on that side moved up and in…. now the other thing is my bumper… the same thing -on that side, the bumper is farther away from the grille. help!!! if you have any ideas, comments, etc, please email me. do you think the mountss are hooped, of is it something else? Thanks… Kirsten
Response:
> I was hoping that someone might be able to shed a little light on my >subject. I have a 1971 GMC p/u and since it was painted last august i was >hearing a weird noise when i went over a couple of bumps. It always >happened on two particular bumps and when i was washing my truck the other >day i noticed that the bolts on the front part of the box on the passenger’s >side were taking a chunk out of my cab. the guy took it apart today and >told me he can’t see why it is doing that. his only idea is the cab mounts, >but he says they look ok. > when i first took it back, we noticed that the box was a lot closer to >the cab on that side moved up and in…. now the other thing is my bumper… >the same thing -on that side, the bumper is farther away from the grille. > help!!! if you have any ideas, comments, etc, please email me. do you >think the mountss are hooped, of is it something else?
Assuming the frame is level from front to rear: Do you have the top and botton trim on your truck? You can often tell when the cab cushions are bad because the upper trim on the cab doesn’t match up with the box trim. You can also get an indication based on the distance near the top of the box versus the bottom. If the distance doesn’t look uniform vertically, then the cab is not sitting level on the frame (cushions are crushed in one place or another). The cushions should not not looked crushed or have cracks. Based on your other description, if the box is not the same distance to the cab on the driver and passenger sides, then I suspect the box and/or the cab is not square on the frame. I would suspect the cab since the distance from the bumper to the grill is greater on the same side it is closer to the box. If you are back at the bumper, you will be farther back where the box and cab meet (if you maintain the fender gaps between the cab). When I was involved in an accident, I knocked my cab back on the passenger side. It’s still not perfectly square, but it’s difficult for anyone to notice but me. -Clint — Clint Olsen . — . .’ ,-. `. ;_,’ ( ; `. “;’ ` — ‘
Response:
the box was a little higher… i remember . i have’t put the moldings back on yet… i thought the box was higher because it is a camper special …3/4 ton… i thought that it was supposed to be like that so it didn’t drag when it was loaded.
Response:
>the box was a little higher… i remember . i have’t put the moldings back >on yet… i thought the box was higher because it is a camper special …3/4 >ton… i thought that it was supposed to be like that so it didn’t drag when >it was loaded.
Yes, the truck will be appear to be jacked up in the rear unloaded, especially if you have a heavy duty rear leaf. Having said that, the trim on the bed will align with the cab under normal circumstances (the trim and the truck just won’t be level with the ground). Note that the bed trim does drop vertically about one inch from the cab to tailgate, so the top trim down the entire length of the truck will never appear perfectly straight. This is to match the tapering flare that occurs at the top of the bed-sides. It’s a rather innocuous design decision by GM I guess. -Clint — Clint Olsen . — . .’ ,-. `. ;_,’ ( ; `. “;’ ` — ‘
Response:
I couldn’t find any new chevy truc related info on the web, so I started my own mail list. Ford owners have a ton of mail lists and web sites. Lets show them that bowtie boys support their trucks just as much!! This mail list if for owners of Chevy and GM Trucks of all makes amd models. We will focus more on late-model trucks, especially the new Sierra’s and Silverado’s, but any and all discussion of GM and Chevy trucks is more than welcome. The messages of the group and other group information is found at> http://www.egroups.com/list/chevytrucks/ The group address is Hope to see all of you there!! Thanks, Timm Buchanan 99 Silverado LS Monroe Conversion
Response:
i would also sugest that if you do not know the history of the truck ! then have the frame checked,also get someone to drive behind you see if it is dog tracking at all ! i had a simaler prob and found it was my frame, Bill – Hide quoted text — Show quoted text ->the box was a little higher… i remember . i have’t put the moldings back >on yet… i thought the box was higher because it is a camper special …3/4 >ton… i thought that it was supposed to be like that so it didn’t drag when >it was loaded. >Yes, the truck will be appear to be jacked up in the rear unloaded, >especially if you have a heavy duty rear leaf. Having said that, the trim >on the bed will align with the cab under normal circumstances (the trim and >the truck just won’t be level with the ground). Note that the bed trim >does drop vertically about one inch from the cab to tailgate, so the top >trim down the entire length of the truck will never appear perfectly >straight. This is to match the tapering flare that occurs at the top of >the bed-sides. It’s a rather innocuous design decision by GM I guess. >-Clint >– >Clint Olsen . — . > .’ ,-. `. > ;_,’ ( ; > `. “;’ > ` — ‘
