Join Date: Sep 2006
Location: Las Vegas, Nevada
All hype, the Jerry W. Spec build is as good if not better then what you get in the box, with OEM part reliability.
My F150 has the monster in a box SS kit, eventually I'll be building a Jerry W. Spec trans for it just like I did for my 97 bird. The only thing I dislike about the MIAB SS kit is the Fairbanks shift kit, and their choice of frictions/steels. The things I do like about it, are most of the parts (if not all of the parts) you'll need are there. The SS kit has the mechanical diode clutch, instead of the roller clutch. I just worry about the longevity of the kit. I don't think I'd install one personally since I have 3 really good independent transmission parts houses near me that can get the OEM parts to do the 350-450 J-Spec Build but if you don't have something like that the MIAB kit MIGHT be a good solution for you.
A seperator plate drilled to Jerry's specs or ordered from RobertP with sonnax valvebody upgrade parts would be the better choice over the Fairbanks kit in my opinion.
My truck came with the MonsterInABox SS kit installed 3 months prior to me buying it due to forward drum clutch failure due to bad lip seals, the MIAB SS kit was the best option for a performance 100% rebuild at the time for the previous owner of my truck.
It feels good, but I'm just not 100% sold on it compared to my built J-Spec trans in my 97 DOHC Thunderbird.
-1996 Pearl White Thunderbird 4.6 Sport 4v with many mods:
Current Best: 13.583 @ 103.74 10/2014.
227hp/241tq measured on calibrated mustang dyno, tested at full vehicle simulation with inertia enabled, no number skewing.
-2001 White Ford F-250 Super Duty 6.8 V10, 4-door, 4x4, Limo Tint, BFG KO2's, Bilstein 7100 Remote Reservoir Race Bypass Shocks, 6" Spring lift, Kenwood Double Din, K&N Intake, FlowMaster Exhaust
Amber_Murder's Daily Driver.
-2005 White GMC Sierra 3500 6.6 Duramax, Dually, 4-door, 4x4, Limo Tint, BFG Commercial T/A's, Rancho RS9000XL Shocks, Kenwood Double Din, K&N Intake, Banks Monster Exhaust
Chris_Murder's Daily Driver.