Clearence issues - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JAKES 68GMC · 04-02-2006, 08:34 PM

If you have a NP205 in your 4x4, did you notice that it is very close or rubbing on your floorpan? Mine is rubbing on the floor by a little bit. The only thing I can think of is that by cab bushings are shot and it isn't clearing as good as it should be. I may to dent the cab a little to give the t-case wiggling room. Any input would help.
Jake

*rage'nrat638* · 04-02-2006, 08:48 PM

cab mounts are very easy to change...
it will really help..a lot of things..
steering shaft alignment
fender alingnment
raise cab to proper height
correct shift linkage bind issues

JAKES 68GMC · 04-02-2006, 08:53 PM

There isn't much external shift linkage for a SM465, or any linkage for that matter.

But yeah you're right, cab bushings would probably help oodles of stuff.

shifty · 04-02-2006, 11:22 PM

i just replaced my cab mounts. Cab sits about an inch higher, no exaggeration. i still gotta crank em down tight, but ... i can't imagine it getting much lower with the anti-crumple bolt sleeves in there.

JAKES 68GMC · 04-03-2006, 06:01 PM

ttt

shifty · 04-03-2006, 06:07 PM

just a question: you have a high tranny hump or low hump? if it's welded/stamped in, it's probably a low hump...

DTerry · 04-03-2006, 06:19 PM

With my understanding he has a high hump because its a 4x4. 2 wheel drive has the low humps. Also I think the high humps are bolted in? I know the low humps are molded in with the floor. Unless you got a new cab it should be a high hump. Sry not much help.

JAKES 68GMC · 04-03-2006, 06:28 PM

Yeah it's a bolt-in high hump. The t-case is rubbing right under where the tranny hump bolts in. Right on the back flange , going towards the rear of the truck. I think cab mounts would solve my troubles.

shifty · 04-04-2006, 09:36 AM

I would look at two things: Shorter tranny mount and new cab mounts. That's assuming you can find a shorter tranny mount. I think the 4x4 abd standard crossmembers are different also, I saw some pictures of both posted in here some time ago and the way they hung down didn't look the sam.e

**CPNE** · 04-04-2006, 01:37 PM

With that NP205 case, did you get the crossmember and torque mount brackets from the donor? If you're using the old rockwell pieces, they may be incompatable with the np205 case, making it sit too high or at wrong angle.

My old GMC's cab mounts are noexistant and it doesn't rub, so even if your mounts gain you clearance, you still may have problems with driveline angles, etc.

Just a thought.

JAKES 68GMC · 04-04-2006, 03:40 PM

The crossmember from the Rockwell worked fine on the 205, but the t-case just rubs a little bit on the pan, right on a high spot of the case. Not too much, just a little bit. Do the crossmembers have different angles depending on what t-case the truck has? I think cab mounts would give me all the clearence I need and then some.

It's not that big of a deal, anyways. I was just curious if anyone else had the same problem.

**CPNE** · 04-04-2006, 04:39 PM

If memory serves, they crossmembers are different between the 2 cases. PM Yukon Jack, he may know for sure. I hate to see you end up with cobbled mess if its a simple matter of using the correct crossmember. However, this is only a suspicion and I could be wrong, so get a second opinion, from someone who has done the swap.

67ChevyRedneck · 04-04-2006, 04:46 PM

My 700R4 was rubbing the front of my cab, I was going to put a high hump in it until I installed new bushings, no more rub. My cab was raised almost an 1" at the front. If the t-case mounts are correct, order a cab mount kit and be done with it

04-02-2006, 08:34 PM	#1
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Clearence issues If you have a NP205 in your 4x4, did you notice that it is very close or rubbing on your floorpan? Mine is rubbing on the floor by a little bit. The only thing I can think of is that by cab bushings are shot and it isn't clearing as good as it should be. I may to dent the cab a little to give the t-case wiggling room. Any input would help. Jake

04-02-2006, 08:48 PM	#2
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: Clearence issues cab mounts are very easy to change... it will really help..a lot of things.. steering shaft alignment fender alingnment raise cab to proper height correct shift linkage bind issues

04-02-2006, 08:53 PM	#3
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: Clearence issues There isn't much external shift linkage for a SM465, or any linkage for that matter. But yeah you're right, cab bushings would probably help oodles of stuff. Last edited by JAKES 68GMC; 04-02-2006 at 08:55 PM.

04-02-2006, 11:22 PM	#4
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Re: Clearence issues i just replaced my cab mounts. Cab sits about an inch higher, no exaggeration. i still gotta crank em down tight, but ... i can't imagine it getting much lower with the anti-crumple bolt sleeves in there. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

04-03-2006, 06:01 PM	#5
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: Clearence issues ttt

04-03-2006, 06:07 PM	#6
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Re: Clearence issues just a question: you have a high tranny hump or low hump? if it's welded/stamped in, it's probably a low hump... __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

04-03-2006, 06:19 PM	#7
DTerry '70 GMC C-25 LWB Join Date: Oct 2004 Location: Binghamton, N.Y. Posts: 273	Re: Clearence issues With my understanding he has a high hump because its a 4x4. 2 wheel drive has the low humps. Also I think the high humps are bolted in? I know the low humps are molded in with the floor. Unless you got a new cab it should be a high hump. Sry not much help. __________________ 1970 GMC C-25 LWB (middle of frame up) 5-7 drop with 3in drop spindles, flip kit with blocks and still keeping the 3/4 ton. Shaved drip rails and marker lights, rear roll pan, cowl induction hood. 1987 Camaro z28 350, vortec 305 heads. 10:1 comp, t5 trans. Street terrrorizer. 1988 Monte Carlo (Super Stock ashpalt race car) My Truck

04-03-2006, 06:28 PM	#8
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: Clearence issues Yeah it's a bolt-in high hump. The t-case is rubbing right under where the tranny hump bolts in. Right on the back flange , going towards the rear of the truck. I think cab mounts would solve my troubles.

04-04-2006, 09:36 AM	#9
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Re: Clearence issues I would look at two things: Shorter tranny mount and new cab mounts. That's assuming you can find a shorter tranny mount. I think the 4x4 abd standard crossmembers are different also, I saw some pictures of both posted in here some time ago and the way they hung down didn't look the sam.e __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

04-04-2006, 01:37 PM	#10
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	Re: Clearence issues With that NP205 case, did you get the crossmember and torque mount brackets from the donor? If you're using the old rockwell pieces, they may be incompatable with the np205 case, making it sit too high or at wrong angle. My old GMC's cab mounts are noexistant and it doesn't rub, so even if your mounts gain you clearance, you still may have problems with driveline angles, etc. Just a thought. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

04-04-2006, 03:40 PM	#11
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: Clearence issues The crossmember from the Rockwell worked fine on the 205, but the t-case just rubs a little bit on the pan, right on a high spot of the case. Not too much, just a little bit. Do the crossmembers have different angles depending on what t-case the truck has? I think cab mounts would give me all the clearence I need and then some. It's not that big of a deal, anyways. I was just curious if anyone else had the same problem.

04-04-2006, 04:39 PM	#12
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	Re: Clearence issues If memory serves, they crossmembers are different between the 2 cases. PM Yukon Jack, he may know for sure. I hate to see you end up with cobbled mess if its a simple matter of using the correct crossmember. However, this is only a suspicion and I could be wrong, so get a second opinion, from someone who has done the swap. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

04-04-2006, 04:46 PM	#13
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Clearence issues My 700R4 was rubbing the front of my cab, I was going to put a high hump in it until I installed new bushings, no more rub. My cab was raised almost an 1" at the front. If the t-case mounts are correct, order a cab mount kit and be done with it __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!



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