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Best Quality Rear Tranny Mount for an Automatic. #2788647
06/23/20 09:17 PM
06/23/20 09:17 PM
Joined: Jan 2003
Posts: 2,179
Walton, Indiana
TimS Offline OP
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TimS  Offline OP
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Joined: Jan 2003
Posts: 2,179
Walton, Indiana
Need a rear tranny mount for the 727 in my 72 Roadrunner and see some pretty cheap looking examples offered by Auto Zone and OReilly’s. Where is the best place to get a good quality piece?


1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor
1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic
1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow
1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top
2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue
2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black
2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver
Re: Best Quality Rear Tranny Mount for an Automatic. [Re: TimS] #2788657
06/23/20 09:52 PM
06/23/20 09:52 PM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
R
RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
R

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
I have this one (poly?) but I read too much about they being stiff enough to cause the alum trans case to break.

SAM_1150.JPG

live every 24 hour block of time like it's your last day on earth
Re: Best Quality Rear Tranny Mount for an Automatic. [Re: TimS] #2788735
06/24/20 08:36 AM
06/24/20 08:36 AM
Joined: Jan 2003
Posts: 13,351
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 13,351
Marion, South Carolina [><]
I've had the same Prothane brand of poly mount in my cuda since 1997. Started out as a very mild 440 daily driver and now makes well over 1k hp.
Only trans case I hurt was when a stock clutch drum exploded in 2008...the entire trans case had to be swept up off the first 20 feet of the track.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Best Quality Rear Tranny Mount for an Automatic. [Re: TimS] #2788785
06/24/20 12:01 PM
06/24/20 12:01 PM
Joined: Jan 2003
Posts: 5,894
Florida
Locomotion Offline
master
Locomotion  Offline
master

Joined: Jan 2003
Posts: 5,894
Florida
I've been using the poly trans mounts in my Dart which has the spool type for many years. Never a problem.

Only extreme condition I could imagine is if you have a lot of HP, hammer on it a lot, and have a lot of unsupported uni-body twist. i.e.: no frame connectors But that just means one hasn't upgraded the rest of the car to keep up with the added HP.

Re: Best Quality Rear Tranny Mount for an Automatic. [Re: Locomotion] #2788788
06/24/20 12:05 PM
06/24/20 12:05 PM
Joined: Jan 2003
Posts: 2,296
NE Ohio
DoubleD Offline
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DoubleD  Offline
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Joined: Jan 2003
Posts: 2,296
NE Ohio
I second the Poly mount works good - the rubber aftermarket ones as of late seem to shred easy - like the quality is just not there

Re: Best Quality Rear Tranny Mount for an Automatic. [Re: Locomotion] #2788790
06/24/20 12:08 PM
06/24/20 12:08 PM
Joined: Jan 2003
Posts: 2,179
Walton, Indiana
TimS Offline OP
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TimS  Offline OP
top fuel

Joined: Jan 2003
Posts: 2,179
Walton, Indiana
I notice Jegs and Summit sell the Poly style as a complete OE replacement with the bracket or just the Polys with tube by themselves. I would think the whole unit would be worth the extra money. Digging the old rubber out of the stock bracket is probably a hassle and it appears the poly brackets are thicker.


1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor
1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic
1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow
1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top
2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue
2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black
2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver
Re: Best Quality Rear Tranny Mount for an Automatic. [Re: RapidRobert] #2789444
06/26/20 12:36 PM
06/26/20 12:36 PM
Joined: Sep 2003
Posts: 19,310
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,310
north of coder
double R, i "may" be interested in that mount if it's for sale. what year is that for ?
pm me. thanks !
beer







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