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-   -   700 r4 for 1929 dodge with a 1955 dodge hemi ? (http://www.hotrodders.com/forum/700-r4-1929-dodge-1955-dodge-hemi-210398.html)

rustfarmer 12-15-2011 07:40 PM

700 r4 for 1929 dodge with a 1955 dodge hemi ?
 
my first post,im new so bare with me.im building a 1929 dodge with a 1955 dodge hemi (270).im thinking of running a 700r4, a friend said 1st gear isnt any good on that trans ,i should use a 200r4. im using a 1989 dodge shelby decota rear. this is my first build ,with the help of a few friends ,witch can confuse things . any ideas or thoughts ? thanks

1930u 12-15-2011 08:32 PM

If I were building something as cool as a 29 Dodge it would definitely have a 4-speed.

oldbogie 12-15-2011 08:56 PM

Quote:

Originally Posted by rustfarmer
my first post,im new so bare with me.im building a 1929 dodge with a 1955 dodge hemi (270).im thinking of running a 700r4, a friend said 1st gear isnt any good on that trans ,i should use a 200r4. im using a 1989 dodge shelby decota rear. this is my first build ,with the help of a few friends ,witch can confuse things . any ideas or thoughts ? thanks

The 700R4 ratios are 3.06, 1.63, 1, .7
The 200R4 ratios are 2.74, 1.57, 1. .67

The 700R4 is more robust as it came from the factory it is a modified TH350 and is the parent of the 4L60 and 4L60E.

The 200R4 is a growth of the TH200 which was very problematic when put behind a V8 as GM tried as a money saving measure in the 1980's. The 200R4 has to be beefed up to handle being sandwiched between V8 torque and a weighty vehicle. Buick used them behind turbo V6s, but a smaller engine with a turbo has a gentler application of its torque curve than a V8. However, since you're talking a 270 inch old-time Hemi, this may work just fine. That's not the same as dropping a 350, 383, or more on the front of the bell housing. There are plenty of performance rebuilders and kits to beef the 200R4 up which in-spite of the small Hemi, I'd recommend doing.

Bogie

joshp83 12-15-2011 10:00 PM

why dont you use a a 500 or 518 im not sure what bell housing pattern on a old hemi but if u go the gm route id use a 700r lower first gear speedo gears are easier to change and a little cheaper to build

SSedan64 12-15-2011 11:41 PM

1 Attachment(s)
That's one thing I hate about the 2004R, Speedo Drive gear.
Under that rear cover in Pan. Arrrrg. :boxing:


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