5 speed fuller transmission - GMC 366ci engine - Pirate4x4.Com : 4x4 and Off-Road Forum

Leyland · 10-14-2010, 08:43 AM

Curious if anyone has ever used one of these transmissions in a build? I had never heard of this transmission until found one locally for sale and did a little research... I believe they were only used in larger trucks and everything I can find claims a 1:1 final drive so it wouldn't get you any overdrive benefits but I wonder what bellhousings, clutches and adapters could be used for a build if desired.

ruffyj · 10-14-2010, 09:10 AM

Wow! That fuller trans brinds back memories. I cant help with bellhousing/clutch fitment,but I think it is standard sbc/bbc pattern on engine. 4th&5th gear ratios are quite close to each other as I recall. I drove a truck/a 366/fuller/2speed rear axle. The shift pattern was 1stlo/1sthi-2ndlo/2ndhi/3rdlo-3rd-hi/4thlo-5thlo/4thHi-5thHi.

K5runner@hotmail.com · 10-14-2010, 09:35 AM

I've seen the motor/trans combo on the ground, I didn't know if it was a 366 or 427 though. But it looked like a SAE bell housing (I don't know what #) also it had a adapter bell housing for a bigger flywheel. It was the BBC that caught my eye, its cool that there are bigger/better trans out there for our one tons. It would take a lot to make them fit though, there huge!

okiebindernut · 10-14-2010, 01:18 PM

I've seen bellhousings go both ways on the tall deck Chevies. Some have a normal looking Chevy bellhousing, just a little larger inside to clear a larger clutch, but bolt up like a normal pickup bellhousing. Others have had an SAE bellhousing. I think the SAE bellhousings were for an even larger clutch. The determining factor between the two was probably the GVW of the truck.

Davethorik · 10-14-2010, 06:41 PM

Quote:

Originally Posted by okiebindernut

I've seen bellhousings go both ways on the tall deck Chevies. Some have a normal looking Chevy bellhousing, just a little larger inside to clear a larger clutch, but bolt up like a normal pickup bellhousing. Others have had an SAE bellhousing. I think the SAE bellhousings were for an even larger clutch. The determining factor between the two was probably the GVW of the truck.

I have a NP542 GL with the 7.33 first gear out of a C60, it has the larger bellhousing with the adapter plate. The clutch is 13". It was behind a td427 originally.

I believe it was Jp magazine that did the Spicer 3053A swap...yep.

http://www.jpmagazine.com/techarticl...ion/index.html

The bellhousing from my NP542 appears to be the same one in the article. Now if I could just find a cheap 3053A. Might be an option to the OP.

GMCTruxrule · 10-14-2010, 08:31 PM

For ease of adaptability and size restrictions, I would stay with a NV4500 or an SM465. And if you want a super duper uber low first gear, (as if the top two trans aren't deep enough) go with a Sm420.

Leyland · 10-15-2010, 10:53 AM

I was mostly turned off the idea when I found out that 5th was a 1:1 instead of an overdrive, would be no benefit over my current 465 set up. nontheless... would have cool factor and tough as nails for a tow rig if could work behind regular SBC/BBC.

thanks

b454rat · 10-16-2010, 06:12 AM

They did make OD versions of these, but I gave up looking cuase I could never find one.

GMCTruxrule · 10-16-2010, 09:52 PM

lol at the above post.

The ONLY benefit I could see running this trans is the closer gear ratios.

JuniorHeep · 10-16-2010, 10:30 PM

Quote:

Originally Posted by GMCTruxrule

lol at the above post.

The ONLY benefit I could see running this trans is the closer gear ratios.

Yeah, that and the fact that clutches are dirt cheap and the fullers are WAY stronger than any NV/SM EVER thought of being. Not to mention parts availibility. Though i have no idea what it takes to get parts for the old ass SMxxx trannys.

just4cuz · 10-17-2010, 12:25 PM

Quote:

Originally Posted by JuniorHeep

Yeah, that and the fact that clutches are dirt cheap and the fullers are WAY stronger than any NV/SM EVER thought of being. Not to mention parts availibility. Though i have no idea what it takes to get parts for the old ass SMxxx trannys.

Junkyards are full of em (SM420's) if you find one that has older stuff. They were in practically everything pre-1969.

GMCTruxrule · 10-18-2010, 01:15 AM

You can find replacement parts for any SM trans on the internet all day long.

And considering that the 420/465 trans were used in medium duty applications as well as light duty, I don't think lack of strength is enough to make me want to swap to a fuller 5 speed.

Jimbo* · 10-18-2010, 08:18 PM

I have a clark 282V66 five speed out of a C700 dump truck, adapted to a 205.
Works great, but shifts like a two ton truck should
Can give more details and pics tomorrow if needed.

Here's the listing where I got it from. I put it in a K30 which rarely sees highway use, but it works great offroad.

10-14-2010, 08:43 AM	#1 (permalink)
Leyland Wheeler Join Date: Apr 2009 Member # 133568 Location: Ontario Posts: 313	5 speed fuller transmission - GMC 366ci engine Curious if anyone has ever used one of these transmissions in a build? I had never heard of this transmission until found one locally for sale and did a little research... I believe they were only used in larger trucks and everything I can find claims a 1:1 final drive so it wouldn't get you any overdrive benefits but I wonder what bellhousings, clutches and adapters could be used for a build if desired.

10-14-2010, 09:10 AM	#2 (permalink)
ruffyj Registered User Join Date: Sep 2008 Member # 120712 Location: American Falls,Idaho Posts: 19	Wow! That fuller trans brinds back memories. I cant help with bellhousing/clutch fitment,but I think it is standard sbc/bbc pattern on engine. 4th&5th gear ratios are quite close to each other as I recall. I drove a truck/a 366/fuller/2speed rear axle. The shift pattern was 1stlo/1sthi-2ndlo/2ndhi/3rdlo-3rd-hi/4thlo-5thlo/4thHi-5thHi. __________________ 94 YJ. 2.5L, AX5, DD. Other vehicles, 03 F250 6.0L, Wifes vehicle 06 Tahoe/5.3L:laughing: Your drivetrain sure looks good honey:smokin:

10-14-2010, 09:35 AM	#3 (permalink)
K5runner@hotmail.com Zeus of the Sluice Join Date: Jul 2007 Member # 96153 Location: Sun Valley, Ca Posts: 3,171	I've seen the motor/trans combo on the ground, I didn't know if it was a 366 or 427 though. But it looked like a SAE bell housing (I don't know what #) also it had a adapter bell housing for a bigger flywheel. It was the BBC that caught my eye, its cool that there are bigger/better trans out there for our one tons. It would take a lot to make them fit though, there huge! __________________ DD:09' V8 Colorado For Sale Toy:The BlazerRebuild Ultra4 #818 Old tow:92' Dodge Build Sold New tow:05' Dodge Crew 4x4 CTD (stock for now) Looking for sponsors, we're going racing!

10-14-2010, 01:18 PM	#4 (permalink)
okiebindernut Registered User Join Date: May 2009 Member # 135002 Location: Norman, Oklahoma Posts: 96	I've seen bellhousings go both ways on the tall deck Chevies. Some have a normal looking Chevy bellhousing, just a little larger inside to clear a larger clutch, but bolt up like a normal pickup bellhousing. Others have had an SAE bellhousing. I think the SAE bellhousings were for an even larger clutch. The determining factor between the two was probably the GVW of the truck. __________________ 87 Toyota, 4.3, TH350, Dana 300(4 to 1), 60/70 welded, linked and coiled, 6.17's, 44" TSL's.

10-14-2010, 08:31 PM	#6 (permalink)
GMCTruxrule Registered User Join Date: Aug 2005 Member # 51243 Location: Tropical Paradise Posts: 3,410	For ease of adaptability and size restrictions, I would stay with a NV4500 or an SM465. And if you want a super duper uber low first gear, (as if the top two trans aren't deep enough) go with a Sm420. __________________ [COLOR="Lime"][B]1999 Chevy K3500, 5.7/4L80E/14FF/stock/stock/stock[/B][/COLOR]

10-15-2010, 10:53 AM	#7 (permalink)
Leyland Wheeler Join Date: Apr 2009 Member # 133568 Location: Ontario Posts: 313	I was mostly turned off the idea when I found out that 5th was a 1:1 instead of an overdrive, would be no benefit over my current 465 set up. nontheless... would have cool factor and tough as nails for a tow rig if could work behind regular SBC/BBC. thanks Last edited by Leyland; 10-15-2010 at 10:54 AM.

10-16-2010, 06:12 AM	#8 (permalink)
b454rat Registered User Join Date: Jan 2003 Member # 16536 Location: Binghamton, NY Posts: 2,464	They did make OD versions of these, but I gave up looking cuase I could never find one.

10-16-2010, 09:52 PM	#9 (permalink)
GMCTruxrule Registered User Join Date: Aug 2005 Member # 51243 Location: Tropical Paradise Posts: 3,410	lol at the above post. The ONLY benefit I could see running this trans is the closer gear ratios. __________________ [COLOR="Lime"][B]1999 Chevy K3500, 5.7/4L80E/14FF/stock/stock/stock[/B][/COLOR]

10-18-2010, 01:15 AM	#12 (permalink)
GMCTruxrule Registered User Join Date: Aug 2005 Member # 51243 Location: Tropical Paradise Posts: 3,410	You can find replacement parts for any SM trans on the internet all day long. And considering that the 420/465 trans were used in medium duty applications as well as light duty, I don't think lack of strength is enough to make me want to swap to a fuller 5 speed. __________________ [COLOR="Lime"][B]1999 Chevy K3500, 5.7/4L80E/14FF/stock/stock/stock[/B][/COLOR]

10-18-2010, 08:18 PM	#13 (permalink)
Jimbo* Right Wing Radical Join Date: Oct 2004 Member # 36486 Location: S.E. New Mexico Posts: 305	I have a clark 282V66 five speed out of a C700 dump truck, adapted to a 205. Works great, but shifts like a two ton truck should Can give more details and pics tomorrow if needed. Here's the listing where I got it from. I put it in a K30 which rarely sees highway use, but it works great offroad. __________________ Those who would eat, but not work, are thieves. If God had wanted us to be vegetarians, he would have made broccoli more fun to shoot! Last edited by Jimbo; 10-19-2010 at 04:11 PM.*

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