Hey everyone My name is Jeff(torinojh), I am MavKatrina's dad We got her mav couple weeks ago and I am in the process of trying to figure out were the previous owner went wrong... The car was disassembled when we got it,former owner gave up and sold it... motor is supposedly out of '78 pickup it is a 302 D8VE it has a date code of 7h15r can anyone confirm ID of motor? when I got car It had a 50ounce flexplate and a balencer with a partial part# of E1??? could not read rest...I figured easy enuff and installed motor with a 28.5 flex and matching balencer off a '70 302 motor sounds great has a good bit of cam (230/.512) and some headwork/headers/flowmasters/motorsport intake/ holley 650 / mallory unilite. problem is a rumble/vibration that starts a approx. 2200 rpm this is in park,so I don't beleive trans is causing Am I correct in assuming this to be a 28.5 motor? I was also told 4 bolt 28.5 balencers are all the same, is this correct? have been over rest of car, found a few places of metal to metal contact (trans crossmember// exhaust etc.) and feel I have corrected all this... Am wondering if I need a different balencer ****wanted to ad a few things.... former owner removed engine from a '78 f100...(it ran fine)He was told that it was removed from a '78 versallies(spelling?)"lincoln granada". the motor was a stock rebuild. He added the cam/intake/carb. The reason he gave up is the vibration. had motor in and out numerous times with different flex/balancer combos with no success.
Cam is 289/302 (have Cam card) firing order is good/timing is good motor actually sounds nice. Have 2 thoughts at this point... pull pan and see if I can find #'s on crank not sure what to look for, I would guess E2####or later if it is incorrect? 2nd thought... what if it ain't the motor... could it be the convertor/frt pump? is it possible to pull trans and remove torque conv,reinstall trans without torque convertor and see if problem (vibration) stops? I have never done this and do not know how motor will react...any thoughts? motor did not like any of the balencers, vibrated the least with the 70 302 wanted to add: I am using fire order 1-5-4-2-6-3-7-8
Just some other points you might check. Make sure the converter bolts are tight and also make sure the vibration is not coming from the fan. That the fan or the (spacer if it has one) are not somehow damaged or out of balance. They can cause a vibration too.
i got a bad converter once. it had the same vibration. when you pull it look at the snout and see if it is rubbing on one side more than the other. mine had the snout weilded off center. at the same time the flex plate had the wrong weight on it. they pulled two more off the shelf with the same part #s and checked them and they all were different weights, as much as 1 lb. diff. from the lighter to heavier one. if you have some way to check the weight of a stock plate and then check the new one to see if it is close to the stock one...frank...:bananaman :bananaman
pulled trans this a.m. pulled trans...found a couple things with converter that could be a problem first off... with torque converter bolts removed,conv. is free from flexplate but had little or no rearward movement. 2nd... torque converter is an aftermarket, I was "told" that it a tci sat. nite special...have nothing to support this. I compared it to a stock '70 c4 conv. that I had on shelf . (I am useing bellhousing and flexplate/block plate off of same '70 torino c4 in Katie's maverick) They are both 12"... the only difference I can find is that the input shaft will go into the stock conv. 1/8" farther than on the aftermarket :confused: (this is with conv.(s) on bench and input shaft removed from trans) remeasured both transmissions with the same Bell and depth of front pump is the same. Almost tempted to install stock conv. but will reinstall trans with no conv to see if vibration will cease.. I have seen some posts regarding torque applications and am wondering if this may be a case of miss application. Anyone have any thoughts??? Thanks Jeff
Solved Got trans bck in last night late...w/out converter... NO VIBRATION! :bananaman Got up early this a.m. and pulled trans back out Put stock '70 12" conv. in. Noticed that this converter sat about 1/8" farther away from flexplate. Got her fired up a few moments ago and..... NO VIBRATION! :bananaman Not sure if it ia a bad tor. conv or missapllied... Trans is a bit of an oddball It is a '77 truck case... has extra set off holes for a big bell and is a pan fill When the former owner installed the motor he also installed new headers apparantly the new headers would not clear the truck bell and he installed a '72 bell that bolts to the front pump. had vibration ever since.both he and I assumed vibration was inmotor When I put it together for first time I used a '70 torino bell.only reason I did this was that starter bolt holes on '72 bell were stripped. Seems to be now that I have a pan fill Bell on the trans, I have to use a pan fill torque even though the trans is a case fill :confused: Found a useful link that has a good description and pics of this C4 and and the differences between different c4's: http://www.mustangcentral.net/tech/c4.html
Congratulations on finding the problem (more or less). Mixing and matching parts has caused it's share of problems for more than one person. Keep us updated on the TC and bellhousing difference. I've never messed with any of the C4 pan fills - I am learning something here. Cleaver
ya know... just for s&g... do many of you all have some kind of vibration happen around 65 mph? both my mavs do this. go 60 or 70 and smooth as silk. but right at 65 (both have c4 and stock rear ratio) they vibrate. not bad. just enough to be noticed by those of us who pay attention to our cars while driving. (in other words... the wife says "hear what noise?")me n todd can hear/feel it though. nice to meet you jeff. if you didn't see katies' posts, me n todd are the guys who bought the chrome mav arm rests at carlisle. welcome aboard!
