KevinF56

iTrader: (9)

On my old truck (2004 4wd, 5.3L, 3.73s) I had a Yank SS3600 and absolutely loved how the truck drove. It flashed right to 3,600rpm (when in 4wd, 2wd destroyed the tires) and had great shift extensions, however was tight enough around town to not make me hate it. The truck I have now is a 2wd 5.3L with 4.10s. I think I've read on here that numerically higher gears will make a converter feel tighter, therefore lowering where it would flash to. Is this true?

My question is I'm thinking of picking up a converter. I loved how the SS3600 was in my old truck and would like the same thing, however due to the different gears and lighter truck (at least 400lbs lighter), I'm concerned the 3600 will not flash like it did in my old truck. Would I then need to step up to a SS4000? Would that be too loose? Thanks in advance.

bluecajun5.3

iTrader: (31)

i would stay with the ss3600 or change it out for a circled 3C which is in between the two.

Dezert1500

iTrader: (11)

What cam are you running? Do you have a dyno graph?

KevinF56

iTrader: (9)

Stock cam. Future plans are a cammed 6.0L, probably something in the high 220 or even low 230 range.

I ran the SS3600 in my old truck and was on the stock cam with that. Might have been a little overkill for the stock cam, however it performed way better than the TT3000 I had in the truck before.

Bumpers

iTrader: (10)

it really all depends on the cam and where you need the power... if you get a 3600 behind a six oh you can easily run a low to mid 230s cam in a 2wd with 4.10s... with the 4000 you can run even bigger... prolly just stick with the 3600 unless your building a racetruck

KevinF56

iTrader: (9)

Certainly won't be a race truck, just a quick DD.

Am I correct in thinking though that a numerically higher gear ratio will make a converter feel tighter compared to something with lower gears? In theory it puts more load on the engine due to the lower gears, thus making the converter slip more?

Dezert1500

iTrader: (11)

It does really depend on cam, but then again your truck is light and it's not a track truck I would run a ss3200. You'll be burning tire all day long with a 3600 or 4000 and their is no real point into running such a high stall in a DD on the street. Don't get me wrong a ss3200 will still burn tire, but it will be more controlable and will still flash a little higher with a 6.0 and more power behind it. For a DD I wouldn't go real high in duration like 235+ because in a street truck you want power under the curve and a broad rpm range. A tighter verter behind more power with a mild duration cam will be very streetable and a lot of fun. No sense in building a 4000+rpm truck if it isn't a track truck that spend it's time between 4000-6700rpm.

The deeper/higher the gear the less throttle input it takes to get rolling making the converter "feel" tighter if that's what you are wanting to know.

Rhino79

iTrader: (7)

I run an ss4000 with 4.10's, love it. Shift extensions from 6000 are 4900 to 5000. The 4.10's tightened it up alot over the 3.23's. Depends on your goals, but I like what I have. I don't tow, and wanted the best e.t.'s possible when I go to the track. I cant imagine that a 3600 to 4000 would drive that much differently.

KevinF56

iTrader: (9)

Ok thanks for the responses. I think I'll be going with the 3600 again.