Lift necessary to clear 37's on 71 Pickup - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jracca · 12-06-2005, 11:50 PM

Does anybody here know what lift would be necessary on a 71 3/4 ton 4x4 to clear 37 inch tires?
Any info would be appreciated. Thanks

2wdBlazer · 12-07-2005, 12:13 AM

we should make some sort of lift chart as a stickey. Ok. I would say 6 inches minimum but this would be for a street queen unless the tires are very narrow. I would shoot for 8.

1967k30 · 12-07-2005, 09:49 PM

Yes we do need a lift chart/tire size guide.

Mudder · 12-08-2005, 05:40 AM

Someone write it all up, making sure that its all correct and it can become a sticky.

OhioChevy · 12-08-2005, 09:19 PM

jracca....37 " tires - 8" lift

jracca · 12-10-2005, 10:00 AM

Thanks everyone, The tires are not extremely narrow, I have a set of 37x12.5 goodyear MT, military surplus on hummer double beadlock rims I plan to use, I really wanted to go smaller, 35 or so, but to get a decent highwy RPM with the diesel engine I plan to run, 2500 rpm governed, and still have a ring and pinion that is available in a dana 60 I got the 37s, plus they were a really really good deal. Next step is to experiment with the fit to determine what backspacing I need, since I need to have the rims recentered. I most likely will use a combination of fender trimming and lift to keep the center of gravity reasonable.

**71blksuper4x4** · 12-10-2005, 02:03 PM

I used to have a truck that I had those tires on. I had them on 10" wide rims. The first pic is of the truck with probably around 5 inch or 6 inch lift. The second is around 9-10" lift. Hope this helps. Trevor

**MJN** · 12-11-2005, 12:08 PM

jracca, my brother has the same tires on his '72 GMC with a 6 inch Superlift. They fit perfect and don't rub. He's got a Dana 60 rear and 44 front and a 454 in it. I don't think you'll have a problem with 6 inches. I ran 35's with 4 inches on my '72 Blazer and didn't have a rubbing problem either.

Chris_T · 12-11-2005, 02:53 PM

I have 35s with a 6" front 8" rear lift on my 72 Blazer. With either 8" or10" wheels I will rub both the front and back tires if I'm wheeling it. On the street though or for mild trails it's fine. 37s would hit for sure on much milder stuff.

DaHateTank · 12-15-2005, 12:03 AM

36x12.50-15LT TSLs on 15X8 white spoke wheels hit the rear of the front wheelwell pretty hard on my '72 K/5, on full compression while turning.

13-36-16s also hit on 16X10 rock crawlers, in the same place.

The truck has a 6" Superlift in it. ( so think stiff 6" lift and still hits) I think I could get some more clearance by moving the axle forward a wee bit - front seems to clear easily.

Of course Swampers tend to be a 'lil closer to the size on the sidewall, than other manufacturers, from what Ive seen/heard.

-Marty

1967k30 · 12-16-2005, 04:02 PM

I have been doing a lot of research and it seems that moving the front axle
1" forward helps a lot.Apparently moving the rear axle 2"s back is also a big benifit. I'm going to move my front one forward today if I find time. I have a set of 37"s found and I'm going to try to pick them up.Hopefully in a week or so I'll know what works good. I hope this helps

12-06-2005, 11:50 PM	#1
jracca Registered User Join Date: Oct 2005 Location: Dallas, TX Posts: 49	Lift necessary to clear 37's on 71 Pickup Does anybody here know what lift would be necessary on a 71 3/4 ton 4x4 to clear 37 inch tires? Any info would be appreciated. Thanks

12-07-2005, 12:13 AM	#2
2wdBlazer The Blazer King Join Date: Sep 2000 Location: Valrico, Fl (Tampa) Posts: 1,213	Re: Lift necessary to clear 37's on 71 Pickup we should make some sort of lift chart as a stickey. Ok. I would say 6 inches minimum but this would be for a street queen unless the tires are very narrow. I would shoot for 8. __________________ 72 2wd Blazer. Its the superbichinest, megacoolinest, superflowinest.

12-07-2005, 09:49 PM	#3
1967k30 Senior Member Join Date: Sep 2005 Location: NE Posts: 363	Re: Lift necessary to clear 37's on 71 Pickup Yes we do need a lift chart/tire size guide. __________________ 01 2500 Duramax,6spd,4x4,Not stock. Estimated 550rwhp/1100rwfp on fuel only. 03 3500 Duramax,6spd,4x4,Pac-Brake,not stock Estimated 500rwhp/1000rwfp fuel only 67 K10 in many pieces Little Brothers truck 67 K20 Cummins 12V/NV4500/205, D60/Eaton w/ Detroit,37" Xterrains,crossover steering, Future plans,Twins and lots of fuel.

12-08-2005, 05:40 AM	#4
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,336	Re: Lift necessary to clear 37's on 71 Pickup Someone write it all up, making sure that its all correct and it can become a sticky.

12-08-2005, 09:19 PM	#5
OhioChevy Senior Member Join Date: Jun 2004 Location: Southern Ohio Posts: 489	Re: Lift necessary to clear 37's on 71 Pickup jracca....37 " tires - 8" lift

12-10-2005, 10:00 AM	#6
jracca Registered User Join Date: Oct 2005 Location: Dallas, TX Posts: 49	Re: Lift necessary to clear 37's on 71 Pickup Thanks everyone, The tires are not extremely narrow, I have a set of 37x12.5 goodyear MT, military surplus on hummer double beadlock rims I plan to use, I really wanted to go smaller, 35 or so, but to get a decent highwy RPM with the diesel engine I plan to run, 2500 rpm governed, and still have a ring and pinion that is available in a dana 60 I got the 37s, plus they were a really really good deal. Next step is to experiment with the fit to determine what backspacing I need, since I need to have the rims recentered. I most likely will use a combination of fender trimming and lift to keep the center of gravity reasonable.

12-10-2005, 02:03 PM	#7
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,151	Re: Lift necessary to clear 37's on 71 Pickup I used to have a truck that I had those tires on. I had them on 10" wide rims. The first pic is of the truck with probably around 5 inch or 6 inch lift. The second is around 9-10" lift. Hope this helps. Trevor Attached Images __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

12-11-2005, 12:08 PM	#8
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,985	Re: Lift necessary to clear 37's on 71 Pickup jracca, my brother has the same tires on his '72 GMC with a 6 inch Superlift. They fit perfect and don't rub. He's got a Dana 60 rear and 44 front and a 454 in it. I don't think you'll have a problem with 6 inches. I ran 35's with 4 inches on my '72 Blazer and didn't have a rubbing problem either. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

12-11-2005, 02:53 PM	#9
Chris_T Registered User Join Date: May 2003 Location: Saskatoon, SK Posts: 44	Re: Lift necessary to clear 37's on 71 Pickup I have 35s with a 6" front 8" rear lift on my 72 Blazer. With either 8" or10" wheels I will rub both the front and back tires if I'm wheeling it. On the street though or for mild trails it's fine. 37s would hit for sure on much milder stuff. Last edited by Chris_T; 12-11-2005 at 02:53 PM.

12-15-2005, 12:03 AM	#10
DaHateTank Registered User Join Date: Aug 2002 Location: Iowa Posts: 119	Re: Lift necessary to clear 37's on 71 Pickup 36x12.50-15LT TSLs on 15X8 white spoke wheels hit the rear of the front wheelwell pretty hard on my '72 K/5, on full compression while turning. 13-36-16s also hit on 16X10 rock crawlers, in the same place. The truck has a 6" Superlift in it. ( so think stiff 6" lift and still hits) I think I could get some more clearance by moving the axle forward a wee bit - front seems to clear easily. Of course Swampers tend to be a 'lil closer to the size on the sidewall, than other manufacturers, from what Ive seen/heard. -Marty

12-16-2005, 04:02 PM	#11
1967k30 Senior Member Join Date: Sep 2005 Location: NE Posts: 363	Re: Lift necessary to clear 37's on 71 Pickup I have been doing a lot of research and it seems that moving the front axle 1" forward helps a lot.Apparently moving the rear axle 2"s back is also a big benifit. I'm going to move my front one forward today if I find time. I have a set of 37"s found and I'm going to try to pick them up.Hopefully in a week or so I'll know what works good. I hope this helps __________________ 01 2500 Duramax,6spd,4x4,Not stock. Estimated 550rwhp/1100rwfp on fuel only. 03 3500 Duramax,6spd,4x4,Pac-Brake,not stock Estimated 500rwhp/1000rwfp fuel only 67 K10 in many pieces Little Brothers truck 67 K20 Cummins 12V/NV4500/205, D60/Eaton w/ Detroit,37" Xterrains,crossover steering, Future plans,Twins and lots of fuel.



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