G body hybrid trans crossmember help

just plain john · 07-04-2008, 10:22 AM

For my hybrid project, I obtained the doner GN's 200r4 trans and crossmember, thinking it would be a bolt in, but it looks like it is not. Several people have done the El Camino/LC2 swap. Others have done Monte's and Cutlasses. Could one of you guys steer me in the right direction? Do I drill new holes in the frame, and if so, where? Drivers side? Passenger side? Or do I cut the bracket off the GN crossmember and weld it to the Elco crossmember? What did you guys do?

S10xGN · 07-08-2008, 02:49 PM

We did the reverse (I think?) of what you are doing - we replaced the 200R4 in an '85 MCSS with a T350. this required moving the crossmember to a different set of frame holes (yes the holes were already there) just needed to move it.

HTH,

Russ

Turbo5 · 08-24-2008, 10:24 PM

I just put an LC2 with a BRF 200R4 in an 88 MCSS and used the stock monte's crossmember with a new monte trans mount. Works just fine however my MCSS already had non BRF 200R4 from the factory. Not sure what trans your El Camino has in it now...

turbofish38 · 08-25-2008, 12:20 PM

Only the 1983 and newer frames have the dual mounts on the passenger side for all of the factory crossmembers. Check out this link 700R4 Gforce Crossmember, A, F, G Body Cars from PATC There should be something here that will make it a bolt in.

motorhead · 08-25-2008, 04:10 PM

Look for a G-body "frame extension".

07-04-2008, 10:22 AM	#1 (permalink)
just plain john Registered User Join Date: Apr 2008 Posts: 36	G body hybrid trans crossmember help For my hybrid project, I obtained the doner GN's 200r4 trans and crossmember, thinking it would be a bolt in, but it looks like it is not. Several people have done the El Camino/LC2 swap. Others have done Monte's and Cutlasses. Could one of you guys steer me in the right direction? Do I drill new holes in the frame, and if so, where? Drivers side? Passenger side? Or do I cut the bracket off the GN crossmember and weld it to the Elco crossmember? What did you guys do?

07-08-2008, 02:49 PM	#2 (permalink)
S10xGN Registered User Join Date: Sep 2000 Location: Port Neches, TX Posts: 257	We did the reverse (I think?) of what you are doing - we replaced the 200R4 in an '85 MCSS with a T350. this required moving the crossmember to a different set of frame holes (yes the holes were already there) just needed to move it. HTH, Russ __________________ GN powered '96 S-10 fleetside - GN powered S-10 - 12.17 @ 115.6 on pump gas

08-24-2008, 10:24 PM	#3 (permalink)
Turbo5 V6 Part 2 Coming Soon Join Date: May 2005 Posts: 35	I just put an LC2 with a BRF 200R4 in an 88 MCSS and used the stock monte's crossmember with a new monte trans mount. Works just fine however my MCSS already had non BRF 200R4 from the factory. Not sure what trans your El Camino has in it now... Last edited by Turbo5 : 08-24-2008 at 10:29 PM.

08-25-2008, 12:20 PM	#4 (permalink)
turbofish38 Turbocharged BrunoStachel Join Date: Jan 2003 Location: Deltona,FL,USA Posts: 4,747	Only the 1983 and newer frames have the dual mounts on the passenger side for all of the factory crossmembers. Check out this link 700R4 Gforce Crossmember, A, F, G Body Cars from PATC There should be something here that will make it a bolt in. __________________ Eric Fisher GM Parts Specialist efisher@billheard.com I brought Top Fuel racing to Isreal. And coined the phrase "Burning Down The Menorah". I invented drifting. So Toyota could conform to the Americans With Disabilties Act. I built this city with Rock and Roll. But I built this car with Dew and PopTarts. 3:10 to Yuma. 11.80 in the quarter mile. I wanted to get pierced. So I bought Prince Albert in a can. Looks like this is going to take some time. 86 GN 11.80@115 TA49,60# Mototrons,TT chip and stock intercooler SCCA Regional Champion. Nebraska Region 1997 1986 Buick Grand National E/StreetPrepared Stay Boosted My Friends

08-25-2008, 04:10 PM	#5 (permalink)
motorhead aka: mOtOrHeAd MiKe Join Date: Jan 2002 Location: Orangeville, Ontario Canada Posts: 4,573	Look for a G-body "frame extension". __________________ [1987 Monte Carlo Super Slow\|1991 Z28 SNOWmaro\|2002 B4C Crapmaro\|2007 TrailBlazer AWD Super SNOW] [1987 Turtle Buick] High-Mileage 3.8L (Stock), MAFT Pro, Caspers PnP Harness, Extender Pro, LC-1, PowerLogger, PowerPlate, Garrett T63e, Low-Z 83s, Modified International Semi FMIC, MPE 3" DP, 4" Single Exhaust w/Magnaflow, Dual In-tank Pumps, ProPain Injection, Built 200-4R w/3000 Stall, 8.5" w/Welded Axle Tubes & 3.08s, Tubular UCAs & Boxed LCAs F&R, 36mm 1LE & F41 Swaybars, KYBs, 800lb/in & 200lb/in Springs, Ronal R15 17x9.5s w/275/40s & 325/45 M&H Drag Radials & an HKS Turbo Timer... Just scratching the surface. HULK SMASH FOR GIIIIIIIFTS!

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