Do i really need a built tranny? - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 09-03-2012, 06:54 PM Thread Starter
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Do i really need a built tranny?

Im looking for some clarification over built trannys. Ive got a 03 f350 7.3. 8inches of lift and 37s and eventually 14 and 40s. I drive the truck around town to work and school. Nothing crazy nor alot of towing. I do hope to eventually run a 38r though. Should I get a built tranny like BTS or just maybe a suncoast rebuild kit with a stronger torque convertor?
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post #2 of 9 Old 09-03-2012, 07:02 PM
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i would regear the rear end for sure....


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post #3 of 9 Old 09-03-2012, 07:09 PM Thread Starter
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Im with ya! Im currently getting ready to order those first. Thinking 4.56s. What you think?
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post #4 of 9 Old 09-03-2012, 07:10 PM
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how long till your gonna do the 40's.... and try 40s and make sure you like them there is a big difference dont gear for a certain tire and then change it...


07 F250 Lariat ECSB bed FX4 6.0
leveling kit
XD Strike 17x9 -24 offset 295/70/17 Hankook ATm
HID's
fox shocks & fox dual steering stabilizer kit
K&N CAI
4in. turbo back straight pipe
ARP head studs
EGR delete
SCT Livewire custom tuned
sinister diesel coolant filter kit
blue spring
6.4 Banjo Bolts
BPD 48v FICM
Alpine double din
4 Hertz door speakers
2 rockford fosgate 10's
kenwood amps.

More pics in profile.
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post #5 of 9 Old 09-03-2012, 07:13 PM Thread Starter
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Will my main focus is making sure the engine and tranny is strong til i focus on that suspension. Wouldnt 4.56s be just ok for 37s right now and good for 40s eventually?
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post #6 of 9 Old 09-04-2012, 06:29 AM
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If thats all your doing, just get a big *** cooler, and a good VB and tc. NO need for a BTS tranny.
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post #7 of 9 Old 09-04-2012, 10:16 AM
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All depends on miles on the trans, condition and If your planing on keeping your truck.

If the trans is in good condition and 100K+- get a BTS VB and a better converter..

if 125-150k miles ...start saving $

IMO you must get gears..4.56 is what I would do
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post #8 of 9 Old 09-04-2012, 08:21 PM Thread Starter
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The truck has 196,000 miles on it.My dad bought it new and i bought it from him so i know its been treated well. Im hoping just a good valve body and torque convertor will be enough. Decided to go with 4.56s without a locker.
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post #9 of 9 Old 09-05-2012, 05:20 AM
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Thats an awful lot of gear... I know guys w/ obs trucks w/ 37's and stock 4.10's and they are doing alright; a more powerful SD shouldnt have an issue with 4.10's
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