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which 727's had 4 gear planetarys #1467700 07/14/13 02:01 PM 07/14/13 02:01 PM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	want to build a trans for my drag car and want to find one to start with the best parts and go from there..any idea's?

Re: which 727's had 4 gear planetarys [Re: Plymouth340] #1467701 07/14/13 02:13 PM 07/14/13 02:13 PM
Joined: Jan 2003 Posts: 75,043 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,043 U.S.S.A.	How big an engine and how heavy is your car ? 4 pinion planets may not be necessary. .

Re: which 727's had 4 gear planetarys [Re: JohnRR] #1467702 07/14/13 02:41 PM 07/14/13 02:41 PM
Joined: Feb 2006 Posts: 501 CEDAR RAPIDS Plymouth340 OP mopar
Plymouth340 OP mopar Joined: Feb 2006 Posts: 501 CEDAR RAPIDS	Quote: How big an engine and how heavy is your car ? 4 pinion planets may not be necessary. . 675 hp small block @ 2830 lbs..got a 1972 small block case to start with.

Re: which 727's had 4 gear planetarys [Re: Plymouth340] #1467703 07/14/13 04:53 PM 07/14/13 04:53 PM
Joined: Jan 2003 Posts: 25,858 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,858 Rio Linda, CA	The archives have some info on the planetaries. http://www.moparts.org/Tech/Archive/auto/36.html It should be noted that, after 40+ years, you never know what you'll find inside a 727...parts get swapped. Also worth noting is that 4-pinion planetaries aren't really any stronger than their 3-pinion cousins, the weak point is the splines in the aluminum front planet carrier. If you want reliability go with a steel front planetary. The INTERNET, the MISinformation superhighway

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