Lifted 89 K5 gears - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bulldog89 · 05-09-2016, 08:43 PM

I have a lifted 4x4 89 Chevy K5 (350 TBI/700R4) on 37's. I'm wanting to change the gears to 4:88 or 5:13.

I think these are the ones I need for the rear?
http://www.summitracing.com/parts/rmg-6901691/overview/

But, I can't find the part number for the front set, unless it is the same front and back?

Thanks guys.

Mike C · 05-09-2016, 10:07 PM

I'm pretty sure the gears are the same F to R on the 10 bolt. Low pinion fronts drive on the coast side of the gear instead of the normal drive side. Simple thing to do is order from Summit using the phone instead of your computer.

**special-K** · 05-10-2016, 08:30 AM

Yeah, when it comes to differential parts it's best to talk to someone to make sure you get what you need. If Summit can't give expert advice, call someone like Randy's Ring & Pinion or Reider Racing. They are specialists and will sell you the right stuff

GSP7 · 05-11-2016, 10:42 PM

Id put a bigger axle in off a 3/4 ton truck with 4:10s

For 37"ers 4:10s would work for me. Unless your building a race truck or sumpin

obijuan · 05-13-2016, 02:05 PM

He has a 700r4. He needs 5.13 ideally. You're located in usa. I'm sure there is a 4 wheel parts store somewhere. Call one of those. They can typically have them next day.

Bulldog89 · 05-20-2016, 06:03 PM

Thanks guys. Does having the stock gears in it, hurt the transmission?

obijuan · 05-20-2016, 07:44 PM

Yes. Excessive heat buildup and low line pressures are detrimental to a 700r4. Help it out and put a large cooler inline.

**JIMs70GMC** · 05-21-2016, 08:08 AM

My 83 has the 700r4, w/ 37" tires and 4.56 gears. It seems to do real good.

Bulldog89 · 06-03-2016, 09:29 PM

Thanks guys for the help. Is brand name important in ring and pinion? Are Richmond's good? It looks like through summit racing 2 sets of Richmond ring and pinion and 2 install kits will run about $600, does that sound about right?

http://www.summitracing.com/parts/rmg-6901711/overview/

http://www.summitracing.com/parts/rmg-8310211/overview/

05-09-2016, 08:43 PM	#1
Bulldog89 Registered User Join Date: May 2016 Location: USA Posts: 4	Lifted 89 K5 gears I have a lifted 4x4 89 Chevy K5 (350 TBI/700R4) on 37's. I'm wanting to change the gears to 4:88 or 5:13. I think these are the ones I need for the rear? http://www.summitracing.com/parts/rmg-6901691/overview/ But, I can't find the part number for the front set, unless it is the same front and back? Thanks guys.

05-09-2016, 10:07 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: Lifted 89 K5 gears I'm pretty sure the gears are the same F to R on the 10 bolt. Low pinion fronts drive on the coast side of the gear instead of the normal drive side. Simple thing to do is order from Summit using the phone instead of your computer. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

05-10-2016, 08:30 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Lifted 89 K5 gears Yeah, when it comes to differential parts it's best to talk to someone to make sure you get what you need. If Summit can't give expert advice, call someone like Randy's Ring & Pinion or Reider Racing. They are specialists and will sell you the right stuff __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

05-11-2016, 10:42 PM	#4
GSP7 Registered User Join Date: Sep 2012 Location: Idaho Posts: 652	Re: Lifted 89 K5 gears Id put a bigger axle in off a 3/4 ton truck with 4:10s For 37"ers 4:10s would work for me. Unless your building a race truck or sumpin __________________ '81 K20 Silverado , '99 Dodge Cummins 4x4, '05 Dodge Cummins 4x4, Pinstriping-Lettering-Specialty Painting

05-13-2016, 02:05 PM	#5
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	Re: Lifted 89 K5 gears He has a 700r4. He needs 5.13 ideally. You're located in usa. I'm sure there is a 4 wheel parts store somewhere. Call one of those. They can typically have them next day.

05-20-2016, 06:03 PM	#6
Bulldog89 Registered User Join Date: May 2016 Location: USA Posts: 4	Re: Lifted 89 K5 gears Thanks guys. Does having the stock gears in it, hurt the transmission?

05-20-2016, 07:44 PM	#7
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	Re: Lifted 89 K5 gears Yes. Excessive heat buildup and low line pressures are detrimental to a 700r4. Help it out and put a large cooler inline.

05-21-2016, 08:08 AM	#8
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Re: Lifted 89 K5 gears My 83 has the 700r4, w/ 37" tires and 4.56 gears. It seems to do real good. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

06-03-2016, 09:29 PM	#9
Bulldog89 Registered User Join Date: May 2016 Location: USA Posts: 4	Re: Lifted 89 K5 gears Thanks guys for the help. Is brand name important in ring and pinion? Are Richmond's good? It looks like through summit racing 2 sets of Richmond ring and pinion and 2 install kits will run about $600, does that sound about right? http://www.summitracing.com/parts/rmg-6901711/overview/ http://www.summitracing.com/parts/rmg-8310211/overview/



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