front seal tightening the modular if its loose ... i see in your sig that you are a transmission builder. Step-15: Remove Sealing Rings So i am going to drop the transmission, what else should i do while it's down. Anybody got a picture of the C4, exploded view? You can replace both the pump seal and tail seal with the transmission sitting horizontal. Press the new seals on. Done it many times. You have to remove the transmission, remove the torque converter to access the seal. I'm going to replace front shocks on a dodge journey 2011 and saw i had leaks on the cv axle seals. They should also be removed and replaced. Rear seal: The rear crankshaft seal is placed along with the transmission; therefore, the process of replacing it requires the removal of transmission, as well as the clutch and flywheel assembly. Signs of a Bad Front/Rear Differential. Using a calipers and straight edge, measure the distance as shown, from the bolt plate of the torque converter to the front of the tranny housing (back edge of the straight edge shown). The part are not all that expensive, it is the labor that jacks the price tag up. If it happens to be a front shaft seal that leaks (fluid would be gathered behind the lower inspection plate, on the bottom front of the transmission), then the transmission would have to be pulled out to replace that seal. This article provides detailed steps for how to remove and replace the driver’s-side CV axle and its axle shaft seal. The average cost can start from $400 and get to as high as $1,000 depending on the car make, model, year, and on the labor cost. The Hydrostat seal is also a very straight forward, but there is a bearing directly behind the seal. Is there anything besides the seal that can leak in there? Just think if you needed to replace the tail seal, it can be done in the car. You must remove the transmission and then remove the seal. I quickly watched a video on youtube to make sure I'm not missing anything and the gentleman in the video mentioned to replace cv axle if changing the seal. I bought the seals as i was going to be in the same vicinity. 21) Front side of the transmission. At this time remove the tailshaft/governor support sealing rings. Otherwise a front pump bushing & seal problem. After the trans. is out, take it to a trans. In a typical front-wheel drive car, replacing an axle seal might cost $150-$250 for one seal. Flip the transmission on the front end, and remove the valve body. Consequently, it has to be removed along with many of the components attached to the front of the block to replace the front main seal. I have a th350c that I want to change the front seal while I have it out of the truck. Some issues can be fixed by servicing the vehicle, while complete differential replacement can cost you a … I was thinking new modulator and seal (don't need it, but it's cheap insurance). The input shaft inserts into the torque converter or clutch disk, depending on whether the vehicle is equipped with an automatic or manual transmission. I was on here a couple of weeks ago telling that we had bought a used C4 and at least wanted to replace the seals in it before installing it in the car. To prevent gouging the aluminum when applying leverage, place a piece of cardboard in between the puller and the transmission. Like any other vehicle component, the front or rear differential are prone to damage. I now have all of those seals, plus a o-ring for the dipstick tube. These are not gapless rings as found elsewhere in a C4 transmission. shop. I removed the converter and tipped the tranny on the bell housing, leaks from the seal. Remove the transmission mounting bolts (red) and transfer case bolts (green). In this article, I'll go over the steps involved with replacing the driveshaft output shaft seal on BMW E90 models with a manual transmission. question for you. It depends on the kind of transmission in many cases. Replacing a C4 Transmission Front Pump Seal: Once I started driving the 66' I found that the C4 Automatic transmission had a strange fluid leak between the bellhousing and the main case. But other leaks like a pan gasket leak is pretty easy to fix. I thought it would make some sense changing the transmission front seal at the same time. Do I need a special instrument to install the seal? Most times when a front seal is leaking it is because the bushing that supports the torque converter is worn, so it is wise to replace … This means that the transmission fluid level will need to be topped up after the seal replacement. Step-14: Remove Front Pump Sealing Rings. Would like to fix bad transmission leak at the front. Anyway, what do I need to do to remove/replace the seal? I have a turbo 350 that is leaking from the front pump seal and thought I would ask on here what all I should do to fix the leak. The bell housing and transmission stay as one piece. Depending on front/rear seal and the type of transmission - you could be looking at $200 to $600, with 600 being for the front seal which is harder to replace. Do I really need special tools, or if I'm careful, can I use standard tools? 94 Ford Explorer. Fluid, filter and pan gasket are new, but i will replace … The axle's inner or outer boots may have split, the internal bearings may be worn (making noise during turns), or ATF fluid may be leaking from the axle shaft seal(s) seated in the transmission differential. Rear seal: The rear crankshaft seal is placed along with the transmission; therefore, the process of replacing it requires the removal of transmission, as well as the clutch and flywheel assembly. Most likely the bushing behind the seal is worn out allowing fluid to leak past the seal. In some vehicles, a small amount of transmission fluid leaks out when the seal is removed. Use a seal puller to remove the transmission output seal. I have a 89 ford aerostar with a a4ld that is really leaking fluid from the front seal, I have the trans out and on my bench ready to remove the front seal and replace it. I understand that replacing converter seal is easy but not sure about the pump seal. I highly recommend that any time you drop the transmission that you replace the input shaft seal and gasket if it has not been recently replaced. The advice here was to buy front and rear seals, selector seal, and kickdown seal. The cost of replacement or repair depends on the type of damage. Consequently, it has to be removed along with many of the components attached to the front of the block to replace the front main seal. You should replace the seals … I bought the seals as i was going to … Vehicles with a front-wheel drive bias layout usually have two output shaft seals (also known as axle seals). One year I had very bad leaking in my race car, replaced the bushing & seal several times, used a towel to avoid track spillage. Front pump/ forward clutch sealing Rings are gapless types. On the Live PTO models, there is a PTO drive gear that fits in a slot in the bottom of the retainer housing inside the transmission. The torque converter comes off with the transmission. Replace and lubricate the seal on the OD of the piston. The rear main seal for a car can cost less than $50, so you might be wondering why it costs hundreds to replace the rear main seal. Same thing except that you had to pull the trans to get to the front seal. Pull/Drive out the front main seal and rear main seal with a flat head screwdriver. But when I tried to put the new seal in it would not hammer all the way in. Most people choose to replace the bottom two copper washers (or add them if you don't have any) to the pump housing bolts. The location of the leak is important. I have the o ring. I am in the process of replacing engine my car has 200k miles. It … The pump does not need to be removed. SOURCE: Front Main Seal is blown on the Transmission. I’m trying to replace the seal on the front of a TO-35 transmission, how do I get the retainer off? I chose to replace mine even though they didn't leak. I'm wondering how to go about this as the Gregories manual doesn't have a dedicated part for changing the transmission seal. one side would go in but the other side would be sticking out after about 15 min the seal ended up geting messed up. If it’s in the transmission, it’s usually at the front. I already pulled out the old seal that was fairly easy. My idea was to replace front transmission seals at the same time with transmission still in the car. You should replace the seals yourself. When this happens trans fluid seems to be leaking out of the bottom of the bell housing. On my VS Auto I'm getting fluid leaking near where the plastic inspection plate is under the torque converter, my guess is the front transmission seal getting old. The front part of the crankshaft is where the balancer or dampener (same thing) is bolted too and is where the serpentine belt is driven from. The distance should be 17.1mm. The tech manual show the seal bearing and shaft coming out from dissembling behind and removing it through to to the front. do i HAVE to pull off the tail shaft housing to replace the bearing thats behind the seal? Figure 6. Always replace sealing rings in any case. I think the front seal on my C4 is starting to leak when the car is warm. If you see dirt gathered around the out put shaft seal and a clean oily area, this indicates a leak at the seal. The fluid was red, so it had to be transmission fluid plus it would only leak when the car had been driven. The input shaft seal, also called the front transmission seal, prevents fluid from slipping past the input shaft. Remember, this is a lip seal, and you want the lip to face the smooth side of the piston in this case. I'm 99.9% sure its the front seal. Step 6 – Replace the transmission output seal. This seal is located at the front of the crankshaft as it protrudes out of the front of the engine block. I would suggest replacing your transmission fluid when you replace this seal. I don't see why it can't be replaced just like it looks, remove snap ring, replace seal. Due to the high labor effort needed, fixing a transmission front seal is one of the expensive repairs related to fluid leaks. 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