78 chevy 4x4 3/4 ton engine swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

78chevypickup · 01-03-2011, 01:00 PM

Hi, I have a 78 chevy 4x4 3/4 ton pickup and I am putting a 2002 chevy 5.3 engine and 4l60E transmission in it. I was wondering what you guys think would be the best transfercase for my application. thanks a lot!

78chevypickup · 01-03-2011, 03:55 PM

I had a 203 transfercase in the pickup but with the new (4l60e) transmission I need a diff. transfercase please help thanks!

benoit454 · 01-03-2011, 04:44 PM

do you want to keep a full time case or does it have a part time kit in it? You may need to find an adapter that will let you bolt it up to the 4l60, maybe advance adapters. I aint a hundred percent but I think they have the same tail bolts and pattern as a 700r4? if so then it's the same as a th350 and all you need is a th350 or 700r4 t-case adapter which came stock in these trucks so should be easy to find. I'm not completely sure of the tail though so might need to research more, if not then advance adapters should have what you need. I thinkmost 4x4 that had the 4l60 is a DS drop like the 88-98 trucks so it would be on the wrong side for your front axle. That may not be a problem if you wanted one of the newer like 241c t-cases but you'd need a new front axle like a ford one or something with a ds pumpkin/diff. That could lead into alot of things, like steering, brakes, etc, that would need modified or changed.

If the th350 or 700r4 adapter would work on your trans you could use a 208 t-case or even hunt down a 205, maybe find the 88-91 burb 241 that has a ps drop.

78chevypickup · 01-04-2011, 02:01 PM

Hey thanks a lot I'll check it out

78chevypickup · 02-10-2011, 03:09 PM

Benoit454 thanks alot, advance adapters had the adapters i needed to put my old t-case on my 4l60e, thanks so much

78chevypickup · 02-10-2011, 07:27 PM

Does anyone know how to tell a 203 t-case (is a 203 full time?) from a 205 t-case i think my 78 chevy pickup has a 205 but not for sure, it had a 400sbc 400trans. It has a spot for a PTO to be mounted, i know they put tags on transforcases but i can't find one. Thanks

1BadSS · 02-10-2011, 09:41 PM

Does your truck have unlockable front hubs?

TheWhiteElephant · 02-10-2011, 10:13 PM

Quote:

Originally Posted by 78chevypickup

Does anyone know how to tell a 203 t-case (is a 203 full time?) from a 205 t-case i think my 78 chevy pickup has a 205 but not for sure, it had a 400sbc 400trans. It has a spot for a PTO to be mounted, i know they put tags on transforcases but i can't find one. Thanks

The 205 has a small circular plate in back with 3 bolts on it. It is gear driven (not chain) and is the strongest T case in these trucks. Bulletproof.
Posted via Mobile Device

78chevypickup · 02-11-2011, 04:56 PM

the hubs are warn hubs and can be locked and unlocked, and i looked at the circular plate on the back and it has more than 3 bolts so i guess its a 203?

78chevypickup · 02-12-2011, 03:26 PM

Does anyone know where one can find custom motor mounts for 78 chevy to a chevy 5.3? thank you "the white elephant" your help was great!

78chevypickup · 02-28-2011, 04:26 PM

thanks a lot to all the guys who have been helping me on here, last week i got my 5.3 sit in my pickup and this week hopefuly i can get a the motor mounts put in. This is a project, but a fun one so worth it hope to have pictures up soon.

78chevypickup · 03-22-2011, 07:53 PM

hey just woundering, if I would put long tube headers on my 5.3 does anyone know if that will help my mileage? just not to sure thanks!

TheWhiteElephant · 03-22-2011, 11:15 PM

Quote:

Originally Posted by 78chevypickup

hey just woundering, if I would put long tube headers on my 5.3 does anyone know if that will help my mileage? just not to sure thanks!

As far as I know, not a noticeable amount.

78chevypickup · 03-29-2011, 03:06 PM

thanks TheWhiteElephant your help is great i got one more ? for you. Do you know where i can find fuel pressure spec's. here the deal i have a 2002 5.3 enigne and i need a fuel pump for it and i think it needs 55-62psi and i found a 07 chevy pickup tank and pump do you think the pressure would be the same or not? thanks guys!

01-03-2011, 01:00 PM	#1
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	78 chevy 4x4 3/4 ton engine swap Hi, I have a 78 chevy 4x4 3/4 ton pickup and I am putting a 2002 chevy 5.3 engine and 4l60E transmission in it. I was wondering what you guys think would be the best transfercase for my application. thanks a lot! Last edited by 78chevypickup; 01-03-2011 at 03:58 PM.

01-03-2011, 03:55 PM	#2
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap I had a 203 transfercase in the pickup but with the new (4l60e) transmission I need a diff. transfercase please help thanks! Last edited by 78chevypickup; 01-03-2011 at 03:58 PM.

01-03-2011, 04:44 PM	#3
benoit454 Chris Join Date: Nov 2004 Location: Monaville, WV Posts: 3,737	Re: 78 chevy 4x4 3/4 ton engine swap do you want to keep a full time case or does it have a part time kit in it? You may need to find an adapter that will let you bolt it up to the 4l60, maybe advance adapters. I aint a hundred percent but I think they have the same tail bolts and pattern as a 700r4? if so then it's the same as a th350 and all you need is a th350 or 700r4 t-case adapter which came stock in these trucks so should be easy to find. I'm not completely sure of the tail though so might need to research more, if not then advance adapters should have what you need. I thinkmost 4x4 that had the 4l60 is a DS drop like the 88-98 trucks so it would be on the wrong side for your front axle. That may not be a problem if you wanted one of the newer like 241c t-cases but you'd need a new front axle like a ford one or something with a ds pumpkin/diff. That could lead into alot of things, like steering, brakes, etc, that would need modified or changed. If the th350 or 700r4 adapter would work on your trans you could use a 208 t-case or even hunt down a 205, maybe find the 88-91 burb 241 that has a ps drop. __________________ Chris GIT R DONE!!!!!! Check out all our rides, http://www.cardomain.com/id/benwa454 Last edited by benoit454; 01-03-2011 at 04:45 PM.

01-04-2011, 02:01 PM	#4
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap Hey thanks a lot I'll check it out

02-10-2011, 03:09 PM	#5
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap Benoit454 thanks alot, advance adapters had the adapters i needed to put my old t-case on my 4l60e, thanks so much Last edited by 78chevypickup; 02-10-2011 at 03:10 PM.

02-10-2011, 07:27 PM	#6
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap Does anyone know how to tell a 203 t-case (is a 203 full time?) from a 205 t-case i think my 78 chevy pickup has a 205 but not for sure, it had a 400sbc 400trans. It has a spot for a PTO to be mounted, i know they put tags on transforcases but i can't find one. Thanks

02-10-2011, 09:41 PM	#7
1BadSS NOT REALLY BANNED! Join Date: Jul 2004 Location: Shawnee, KS Posts: 1,072	Re: 78 chevy 4x4 3/4 ton engine swap Does your truck have unlockable front hubs? __________________ 1987 Mustang Coupe - 2.7 Stroker, 78mm turbo, Stainless header, 3" Exh, FMIC, 160lb/hr Injectors, MS3, twin walbro 255's, 34psi. Eating V8's daily. 04 Pontiac GTO 04 Ford Mustang GT 68 C20 LWB stripper truck 73 K5 Cheyenne 76 C20 Sierra Crew SRW 88 K20 Suburban I'm not hammering on metal just to hammer, i'm creating a piece of art.

02-11-2011, 04:56 PM	#9
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap the hubs are warn hubs and can be locked and unlocked, and i looked at the circular plate on the back and it has more than 3 bolts so i guess its a 203?

02-12-2011, 03:26 PM	#10
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap Does anyone know where one can find custom motor mounts for 78 chevy to a chevy 5.3? thank you "the white elephant" your help was great! Last edited by 78chevypickup; 02-28-2011 at 03:59 PM.

02-28-2011, 04:26 PM	#11
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap thanks a lot to all the guys who have been helping me on here, last week i got my 5.3 sit in my pickup and this week hopefuly i can get a the motor mounts put in. This is a project, but a fun one so worth it hope to have pictures up soon.

03-22-2011, 07:53 PM	#12
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap hey just woundering, if I would put long tube headers on my 5.3 does anyone know if that will help my mileage? just not to sure thanks!

03-29-2011, 03:06 PM	#14
78chevypickup Registered User Join Date: Jan 2011 Location: Kansas Posts: 10	Re: 78 chevy 4x4 3/4 ton engine swap thanks TheWhiteElephant your help is great i got one more ? for you. Do you know where i can find fuel pressure spec's. here the deal i have a 2002 5.3 enigne and i need a fuel pump for it and i think it needs 55-62psi and i found a 07 chevy pickup tank and pump do you think the pressure would be the same or not? thanks guys!



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