By your signature, I gather that you are also doing a 5-speed swap. Quite simply, what you are comparing is apples to oranges. Your 3.8 L came with with an AOD transmission of some vintage (I have known of no years that the standard, non SC 3.8 L that come with a 5-speed). Assuming this, the reason why you machine shop said it wouldn't work is because it is a flexplate and your 5-speed conversion requires a flywheel. If you are doing the M5R2 tranny swap, a flywheel out of an SC would work fine but I deal with automatics so I don't know if you need the correct imbalance as you need with flexplates. The typical 5.0 L flexplate imbalance is 50 oz.
You will need to use a 50 oz. imbalance flywheel. For a stock F150 5.0 with a M5OD (early 90's) or an aftermarket flywheel with the large ford size (164 tooth ring gear) and 50 oz imbalance. I recommend an aftermarket light wieght version as the F150 unit wieghs a ton.
well i have already bought my clutch and everything for the sc. so im just going to make the sc fly work. the machine shop said that they could make the fly work if i bring in the flex plate from the 5.0 so the can match the inbalance
You can have the SC flywheel rebalanced for the 5.0 which is a 50oz imbalanced setup. Spec clutch can do this as they did mine. Using the SC flywheel means you can use your old stock 5.0 starter. I would send your SC flywheel out to Spec to make sure it is done right.
thanks alan but i think what i will do is see if the clutch will fit my friends 164 tooth fly. from what i gather the only big dif in the clutch is one is an 11' disk the other is a 10.5'. if it wont fit then im taking the sc fly and the 50oz flex to my machine shop and we are going to make a fly!
That flywheel does not have the same center bore and crank pattern as the
5.0L, so it would take more than balancing. Have you heard of people
redrilling the crank flange? I would not recommend that, as I don't think
there is enough meat in that flange . I like my legs and feet.
He is talking about balance and he is correct. The 4.6 and 5.4 in many cases are different. Most 4.6's have a 6 bolt crank that is the same bolt pattern as 302 and 3.8 engines. All 5.4's have an 8 bolt crank and will not bolt on.
Yes there are other threads on the subject, but I haven't found one that addresses both at the same time.
I have a 1996 Mark VIII.
It is tuned with Quarterhorse and has dual cat back exhaust which has made a difference up top/on the highway for sure.
Around town though, it is still...
Not sure if any of you have seen this, but this would make the rear hub swap much more affordable. I was going to re-drill my purchased hubs, but @99.95, I'd rather have new with zinc coating.
Maybe I'm just dreaming here, but that's why I'm asking. I've been driving my dad's '99 Explorer for the last few days and I really love it, specifically the tranny. The five-speed auto does a great job of keeping the SOHC 4.0L V6 in it's powerband, and it is sweet to get on it and a shift only...
I was wondering who uses overdrive (O/D) when driving around town (speeds under 55). I am always flipping the O/D button depending where I am driving. Does it cause wear to the trans. if the O/D is disabled for extended times. At constant highway speeds I always enable the O/D.
When accelerating then letting off the accelerate Im getting a slight clunking from the rear of my car, it's mostly when the car is cold, sounds like something is knocking back and forth in the trunk area, haven't got a chance to get her on a lift yet. Not sure if this is a problem people run...
A forum community dedicated to Ford Thunderbird, Mercury Cougar and Lincoln Mark owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more!