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I bought a parts lot with a T5 tranny included. The id tag reads as follows 1352-034, which is a Ford 1983 SVO Mustang 5.0 V8. I don't recall an SVO Mustang other than the 4 cylinder turbo. The tranny was behind a runninng 302 with an E7 block code. I'm wondering if I should sell this tranny and get a World Class as other say I should. It will be behind either a slightly built 289 or a (stock for now) 351 Cleveland.
 

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You are correct. The SVO has the weaker Non world class T5. You would need a pilot bearing that fits the smaller input shaft diameter of that T5. The gearing is also shorter. I had a similar T5 out of a 87 T-bird Turbo coup. I sold it and picked up a World Class.

You can run it if you like. I was going to run the one I had until it broke but came across a deal on a World class. First gear in them is kinda useless in my opinion unless you do allot of stop & go driving.
 

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That tranny is too old to be a world class, but anything 85 and up is world class, even the other posters 87 turbo coupe tranny was a world class he just didnt know it. By late 1985 the first WC boxes were used by Ford. The WC boxes had 1st, 2nd, and 3rd speed gears riding on roller bearings instead of solid shafts. The countergears saw an upgrade to tapered bearings. The bronze synchro rings were replaced by fiber lined rings and dual cone designed rings to improve ring surface area. These were also used behind svo 4 cyl cars and thunderbirds. But find one that's 85 and up and you will be fine. There are diffrences in the shaft size on v8 or 4cyl t-5's though, keep that in mind.

Here is the tranny I run in my car, this came off a list of transmission identification numbers just to show the svo also used a wc tranny, mine is out of an 85 thunderbird 4cyl turbo car, number reads 1352-114 translates to:

1352-114 Ford 1985-86 T-Bird/Mustang/SVO 2.3 TC L4 WC P 3.76 4.03 2.37 1.49 1.00 0.81

numbers are gear ratios from first to fifth, 4 cyl trannys are a lot steeper geared
 

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Here's a pretty comprehensive list of T-5 ID numbers and applications which might be useful.
 

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i have the same trans in my 86 gt, it IS infact an aftermarket ford motorsports svo transmission, it IS world class tranny, and personally i like the gearing over the stock trans i had in my car when i bought it, 1st gear is ALLOT more fun and can be left in longer also having a 305 ft/tq rating ist stronger than ANY factory mustang trans expt 93 cobra with 310 tq rating so i would say your foots in the [erfect 1st step keep/rebuild that trans your better off even if it needs a rebuild imho

the info on the transmission is all there, it went by three different codes that i know of, 1352-034, 115, 200 depending on the gear tooth for the speedometer also known as a m-7003-A, the info is very hard to find and it took me 3 months to track down it all but trust me the transmission you havs is above and beyond any run of the mill wc t5 you will find out there you lucked out and will be VERY happy with your transmission

T-5, T-56, and Top Loader Transmission Data

115 Motorsport 79-83 Mustang 5.0 tq rating 305 gr ratio 1st 2.95 2nd 1.94 3rd 1.34 4th 1.00 5th 0.63 rev 2.76 spd gr 6 inpt shft legnth 7.18 diam 0.668 trans code a
200 Motorsport 79-93 Mustang 5.0 tq rating 305 gr ratio 1st 2.95 2nd 1.94 3rd 1.34 4th 1.00 5th 0.63 rev 2.76 spd gr 7 inpt shft legnth 7.18 diam 0.668 trans code a
 
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