Looking for info on this trans. Dynamic

chopperloco · 12-09-2023, 06:24 PM

Seems to be a Mopar trans to Chevrolet bell housing
Has not been used
Want to list it for sale once i have more info on it

Thanks
Dom

Steve Grady · 12-10-2023, 10:24 AM

Is the bellhousing a cast part of the case, or does it bolt on? Hard to tell from your pictures.

rsalemi · 12-10-2023, 10:44 AM

That is a 904 Chrysler built for AMC . It was used in AMC cars in early 80's in Sprite and others with the GMC 4 cyl Iron Duke motors . They had a lower first and second gearset - 2.72 and 1.54 instead of the 2.45 1.45 standard gears. As far as I know, everything is standard 904 internals. AMC also used the 904 with AMC bolt pattern behind the 6 cyl 258 motor. That's what I use behind the 4.0 in my Comanche. That trans will probably need the MOPAR converter.

chopperloco · 12-11-2023, 09:04 AM

Quote:

Originally Posted by Steve Grady

Is the bellhousing a cast part of the case, or does it bolt on? Hard to tell from your pictures.

Bolted

Mark Yacavone · 12-11-2023, 03:26 PM

Quote:

Originally Posted by rsalemi

That is a 904 Chrysler built for AMC . It was used in AMC cars in early 80's in Sprite and others with the GMC 4 cyl Iron Duke motors . They had a lower first and second gearset - 2.72 and 1.54 instead of the 2.45 1.45 standard gears. As far as I know, everything is standard 904 internals. AMC also used the 904 with AMC bolt pattern behind the 6 cyl 258 motor. That's what I use behind the 4.0 in my Comanche. That trans will probably need the MOPAR converter.

Don't know about this one either..
In 1980, the Iron Duke was redesigned with the new GM FWD bell pattern.
The one pictured is a std Chevy RWD pattern.

jmantle · 12-11-2023, 09:25 PM

AMC 904 postal van transmission. I believe they were all 904's, not the 998/999 V8 version which had a larger front servo and 4 pinion planetaries. Easy to tell a V8 unit from the outside, they have 2 ribs on top of the rear servo.

chopperloco · 12-12-2023, 03:13 PM

Is anyone familiar with the Dynamic that built this trans.?
Are they still in business?
Thanks
Dom

65signet · 12-12-2023, 04:24 PM

https://www.dynamicconverters.com/converters.htm

pmrphil · 12-13-2023, 09:58 AM

Dynamic transmissions is in Connecticut, used to be partners with Frank Lupo's Dynamic Converter, but I don't recall what year they split up.

340Cuda · 12-13-2023, 02:43 PM

Quote:

Originally Posted by pmrphil

Dynamic transmissions is in Connecticut, used to be partners with Frank Lupo's Dynamic Converter, but I don't recall what year they split up.

Dynamic Transmissions has an active Facebook page, they have a website but it seems to be broke.

From Facebook:

104-5 Enterprise Dr # 5, North Branford, CT

(203) 315-0138

dynamicracemail@aol.com

12-09-2023, 06:24 PM	#1
chopperloco Member Join Date: Feb 2011 Location: Ottawa,Ont.,CANADA Posts: 161 Likes: 148 Liked 82 Times in 23 Posts	Looking for info on this trans. Dynamic Seems to be a Mopar trans to Chevrolet bell housing Has not been used Want to list it for sale once i have more info on it Thanks Dom

12-10-2023, 10:24 AM	#2
Steve Grady Junior Member Join Date: Apr 2023 Location: Columbus, OH Posts: 62 Likes: 99 Liked 63 Times in 32 Posts	Re: Looking for info on this trans. Dynamic Is the bellhousing a cast part of the case, or does it bolt on? Hard to tell from your pictures. __________________ Div 3 Sales, Service and Tech for many manufacturers

12-10-2023, 10:44 AM	#3
rsalemi Junior Member Join Date: Dec 2003 Location: RI Posts: 21 Likes: 0 Liked 21 Times in 9 Posts	Re: Looking for info on this trans. Dynamic That is a 904 Chrysler built for AMC . It was used in AMC cars in early 80's in Sprite and others with the GMC 4 cyl Iron Duke motors . They had a lower first and second gearset - 2.72 and 1.54 instead of the 2.45 1.45 standard gears. As far as I know, everything is standard 904 internals. AMC also used the 904 with AMC bolt pattern behind the 6 cyl 258 motor. That's what I use behind the 4.0 in my Comanche. That trans will probably need the MOPAR converter.

12-11-2023, 09:25 PM	#6
jmantle Member Join Date: Feb 2008 Location: Black Creek, BC Canada Posts: 329 Likes: 74 Liked 169 Times in 80 Posts	Re: Looking for info on this trans. Dynamic AMC 904 postal van transmission. I believe they were all 904's, not the 998/999 V8 version which had a larger front servo and 4 pinion planetaries. Easy to tell a V8 unit from the outside, they have 2 ribs on top of the rear servo. __________________ Jim Mantle U/V/SA 6632

12-12-2023, 03:13 PM	#7
chopperloco Member Join Date: Feb 2011 Location: Ottawa,Ont.,CANADA Posts: 161 Likes: 148 Liked 82 Times in 23 Posts	Re: Looking for info on this trans. Dynamic Is anyone familiar with the Dynamic that built this trans.? Are they still in business? Thanks Dom

12-12-2023, 04:24 PM	#8
65signet Member Join Date: May 2010 Location: El Dorado Ca. Posts: 121 Likes: 291 Liked 44 Times in 21 Posts	Re: Looking for info on this trans. Dynamic https://www.dynamicconverters.com/converters.htm __________________ Steven Barnes Stock 704 N/SA

12-13-2023, 09:58 AM	#9
pmrphil Member Join Date: Aug 2010 Location: CT Posts: 454 Likes: 1,767 Liked 345 Times in 149 Posts	Re: Looking for info on this trans. Dynamic Dynamic transmissions is in Connecticut, used to be partners with Frank Lupo's Dynamic Converter, but I don't recall what year they split up. __________________ Phil Molski PMR Performance S/C 1623