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.
  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
  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.
  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.
  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.
  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.
  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.
  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
  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?
  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.
  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?
  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
  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.
  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.
  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?
  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.
  17. SitDown

    SitDown Founding Member

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

    the toploader is in essence a 4spd 3550
  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.
  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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