T5 1st gear Ratios- 3.35 or 2.95 ?

Discussion in 'Classic Mustang Specific Tech' started by Pbum5, Dec 27, 2004.


  1. Pbum5

    Pbum5 Member

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    Hi All,
    What are some of the advantages of a T5 with the 3.35 1st gear or the 2.95 1st?
    What is the 1st gear ratio in a Top loader 4spd? How much HP can a (small block) Top loader handle? Just want to compare it to a T5 witch is about 300hp (give or take) from what I have read.
     
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  2. usedtobe 67p51d

    usedtobe 67p51d New Member

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    let's tear up golfcourses and build race tracks!
    when they changed to the 2.95 gear,it allowed them to up the torque rateing.
    it should be fine with a "300 hp car" get a shifter with adjustable stops It should help it last longer
     
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  3. Glen's 1965 5.0

    Glen's 1965 5.0 Founding Member

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    2.95

    The 2.95 1st gear will also allow a steeper gear in the rear like 3.73.

    Any 4 speed top loader from the early cars will be inherently stronger than a T5. A Top loader weighs about 125 LBS. That is allot of material to work with. A T5 is approx. 75 LBS. and they have smaller (In thickness) gears.

    Now a T5 is lighter and easier to install on your back. Has tons of machining refinements and most of all overdrive.
     
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  4. chepsk8

    chepsk8 Founding Member

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    I thought the T-5's had a 3.07 first, or something like that.

    The Close-Ratio Top-Loaders have a 2.32 first, good only for Big Blocks. I think first on the wide ratio's is 2.75.
     
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  5. gjz30075

    gjz30075 Member

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    A friend of mine just put a T5z (2.95 1st) in his '65 with a 4.11 rear gear. A great combination. A 3.35 1st wouldn't get him beyond the first 20 feet before having to shift again. And, as pointed out, .63 on the 5th gear is great for cruising.
     
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  6. Pbum5

    Pbum5 Member

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    So what if you had a 3.35 1st and had a 3.20's read end ?
    wouldnt that be like having a 2.95 1st and 4.11's.
    I just threw those #'s out there as an example for a Low 1st gear and high rear end and vice-versa.
     
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  7. D.Hearne

    D.Hearne Banned

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    A wide ratio Toploader's 1st gear is 2.78. And even the small block version will handle 600 ft/lbs torque. 3.35 1st x 3.23 works out to a 10.82 overall . A 2.95 x 4.11's is 12.12. The 1st in my Ranger is 10.36 with the Toploader and 3.73's out back. This combined with taller than a Stang's rear tires ( 28" vs 26") is low as you want to go in 1st gear. It tops out 1st almost instantly on takeoff. I can sometimes take off in 2nd, it's that low.
     
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  8. tjm73

    tjm73 Founding Member

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    In about mid-1983-1984 the T5 had a 2.95 1st gear. Starting in 1985 the 3.35 1st gear showed up and stayed standard right up till current. The FRPP Z spec T5 has the 2.95 gear ratio.

    The company G-Force is making an upgraded strength ratio similar to the 2.95 gear set. It's 2.94/1.94/1.34/1.00/.59 or .73
     
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  9. Pbum5

    Pbum5 Member

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    Wow, I had no idea that the Toploader was that strong.

    So the way to go for a Street Strip Stang (more street than strip) is 2.95 1st gear and 3.73's out back?
     
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  10. D.Hearne

    D.Hearne Banned

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    In a Stang with shorter tires ( 26" vs my Ranger's 28") I'd go with 3.50's in the rear with a 2.95 1st geared trans. You effective ratio in 1st would stll be a little lower than what I've got in my Ranger. The shorter rear tires work to lower the effective ratio.
     
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  11. Pbum5

    Pbum5 Member

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    makes sense
    So why are people running 3.90's and 4.11's if you don't get much out of 1st gear?
     
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  12. SitDown

    SitDown Founding Member

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    the toploader is essentially a tremec 3550 without a 5th gear...

    i run the 2.95 t5z with 410s and the 2 are a perfect combo for the qtr... crossing the traps ~6k on a 26" tire
     
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  13. jaredgoodwin

    jaredgoodwin New Member

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    I run 2.95 first with 3.89 rear (25.5" tire). In my opinion, it is about as short of a 1st gear as you would want (street use). I would highly recommend a 2.95 first with a .63 od, lets you run a high (numerically) rear gear without screwing up 1st and 5th too bad. Best of both worlds.
     
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  14. D.Hearne

    D.Hearne Banned

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    UH, I believe it's the other way around------- A Tremec is more like a Toploader with an OD 5th gear. :D Afterall it's been around a lot longer than Tremec.
     
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  15. Pbum5

    Pbum5 Member

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    Good to know.. What size tire is your 25.5" tire and what size rim is it on?
     
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  16. jaredgoodwin

    jaredgoodwin New Member

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    That was a guess from memory... The tire is 245/60R14 (the sidewall might only be 50 series, can't remember). I think they are 14 x 7's.
     
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  17. SitDown

    SitDown Founding Member

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    UH, thats what i said.... :rolleyes:

    the toploader is in essence a 4spd 3550
     
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  18. D.Hearne

    D.Hearne Banned

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    So tell me, how a Toploader could be a Tremec 3550 without the 5th gear, since the Toploader came first? It's made of iron, not aluminum, and it's got a completely different shifting mechanism. Now if you removed the 5th gear from a 3550, you'd have a 3550 that was similar to a Toploader 4 speed,in it's basic design ( both are assembled thru the top cover, but that's about it) but hardly as strong as a Toploader.
     
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  19. gp001

    gp001 Founding Member

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  20. SitDown

    SitDown Founding Member

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    ...nobody has answered his Q on what power the toploader will hold? as i am uncertian on the specific #s as well, im just trying to give him an idea from what ive been told.

    There are a mass amt of ppl on these boards who run 3550s and TKOs(woulda been a better example) and there #s will likely give him a better idea... and since ppl run 400-500rwhp under their 3550 with no problems then id hope he'd feel confident that he has room to grow.

    i ran a toploader in my 65 until it came out for a tremec so im aware of the differences
     
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